245209440 has 384 divisors, whose sum is σ = 975421440. Its totient is φ = 50485248.

The previous prime is 245209427. The next prime is 245209453. The reversal of 245209440 is 44902542.

245209440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (245209427) and next prime (245209453).

It is a super-2 number, since 2×245209440² = 120255338930227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 245209398 and 245209407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1468237 + ... + 1468403.

It is an arithmetic number, because the mean of its divisors is an integer number (2540160).

Almost surely, 2^245209440 is an apocalyptic number.

245209440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245209440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487710720).

245209440 is an abundant number, since it is smaller than the sum of its proper divisors (730212000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245209440 is a wasteful number, since it uses less digits than its factorization.

245209440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 245209440 is about 15659.1647286821. The cubic root of 245209440 is about 625.9107277420.

The spelling of 245209440 in words is "two hundred forty-five million, two hundred nine thousand, four hundred forty".