402601557 has 32 divisors (see below), whose sum is σ = 566231040. Its totient is φ = 254136960.

The previous prime is 402601553. The next prime is 402601579. The reversal of 402601557 is 755106204.

It is not a de Polignac number, because 402601557 - 2² = 402601553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402601553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1050988 + ... + 1051370.

It is an arithmetic number, because the mean of its divisors is an integer number (17694720).

Almost surely, 2^402601557 is an apocalyptic number.

It is an amenable number.

402601557 is a deficient number, since it is larger than the sum of its proper divisors (163629483).

402601557 is a wasteful number, since it uses less digits than its factorization.

402601557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 402601557 is about 20064.9335159626. The cubic root of 402601557 is about 738.4002188024.

The spelling of 402601557 in words is "four hundred two million, six hundred one thousand, five hundred fifty-seven".