245556690 has 16 divisors (see below), whose sum is σ = 589336128. Its totient is φ = 65481776.

The previous prime is 245556683. The next prime is 245556737. The reversal of 245556690 is 96655542.

It is a super-2 number, since 2×245556690² = 120596176007512200, which contains 22 as substring.

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, 4092582 + ... + 4092641.

It is an arithmetic number, because the mean of its divisors is an integer number (36833508).

Almost surely, 2^245556690 is an apocalyptic number.

245556690 is an abundant number, since it is smaller than the sum of its proper divisors (343779438).

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

245556690 is a wasteful number, since it uses less digits than its factorization.

245556690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8185233.

The product of its (nonzero) digits is 324000, while the sum is 42.

The square root of 245556690 is about 15670.2485621639. The cubic root of 245556690 is about 626.2060466919.

The spelling of 245556690 in words is "two hundred forty-five million, five hundred fifty-six thousand, six hundred ninety".