245663840 has 48 divisors (see below), whose sum is σ = 599114880. Its totient is φ = 95093760.

The previous prime is 245663839. The next prime is 245663857. The reversal of 245663840 is 48366542.

It is a super-3 number, since 3×245663840³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 245663794 and 245663803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19805 + ... + 29724.

It is an arithmetic number, because the mean of its divisors is an integer number (12481560).

Almost surely, 2^245663840 is an apocalyptic number.

245663840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245663840 is an abundant number, since it is smaller than the sum of its proper divisors (353451040).

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

245663840 is a wasteful number, since it uses less digits than its factorization.

245663840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49575 (or 49567 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 245663840 is about 15673.6670884640. The cubic root of 245663840 is about 626.2971162541.

The spelling of 245663840 in words is "two hundred forty-five million, six hundred sixty-three thousand, eight hundred forty".