402597343990 has 32 divisors (see below), whose sum is σ = 742173290496. Its totient is φ = 157156994400.

The previous prime is 402597343943. The next prime is 402597343991. The reversal of 402597343990 is 99343795204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402597343991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88209 + ... + 901651.

It is an arithmetic number, because the mean of its divisors is an integer number (23192915328).

Almost surely, 2^402597343990 is an apocalyptic number.

402597343990 is a deficient number, since it is larger than the sum of its proper divisors (339575946506).

402597343990 is a wasteful number, since it uses less digits than its factorization.

402597343990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814644.

The product of its (nonzero) digits is 7348320, while the sum is 55.

The spelling of 402597343990 in words is "four hundred two billion, five hundred ninety-seven million, three hundred forty-three thousand, nine hundred ninety".