245157440 has 112 divisors (see below), whose sum is σ = 641689344. Its totient is φ = 88473600.

The previous prime is 245157431. The next prime is 245157443. The reversal of 245157440 is 44751542.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 245157397 and 245157406.

It is not an unprimeable number, because it can be changed into a prime (245157443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 904505 + ... + 904775.

Almost surely, 2^245157440 is an apocalyptic number.

245157440 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 245157440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320844672).

245157440 is an abundant number, since it is smaller than the sum of its proper divisors (396531904).

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

245157440 is a wasteful number, since it uses less digits than its factorization.

245157440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 245157440 is about 15657.5042711155. The cubic root of 245157440 is about 625.8664803172.

The spelling of 245157440 in words is "two hundred forty-five million, one hundred fifty-seven thousand, four hundred forty".