402597905 has 8 divisors (see below), whose sum is σ = 484104384. Its totient is φ = 321420400.

The previous prime is 402597889. The next prime is 402597913. The reversal of 402597905 is 509795204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402597905 - 2⁴ = 402597889 is a prime.

It is a super-2 number, since 2×402597905² = 324170146220778050, which contains 22 as substring.

It is a Duffinian 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, 79541 + ... + 84450.

It is an arithmetic number, because the mean of its divisors is an integer number (60513048).

Almost surely, 2^402597905 is an apocalyptic number.

It is an amenable number.

402597905 is a deficient number, since it is larger than the sum of its proper divisors (81506479).

402597905 is a wasteful number, since it uses less digits than its factorization.

402597905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164487.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 402597905 is about 20064.8425112185. The cubic root of 402597905 is about 738.3979861187.

The spelling of 402597905 in words is "four hundred two million, five hundred ninety-seven thousand, nine hundred five".