402938905 has 12 divisors (see below), whose sum is σ = 500500260. Its totient is φ = 311048864.

The previous prime is 402938897. The next prime is 402938911. The reversal of 402938905 is 509839204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 177848896 + 225090009 = 13336^2 + 15003^2 .

It is not a de Polignac number, because 402938905 - 2³ = 402938897 is a prime.

It is a super-2 number, since 2×402938905² = 324719522325198050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240882 + ... + 242548.

It is an arithmetic number, because the mean of its divisors is an integer number (41708355).

Almost surely, 2^402938905 is an apocalyptic number.

It is an amenable number.

402938905 is a deficient number, since it is larger than the sum of its proper divisors (97561355).

402938905 is an frugal number, since it uses more digits than its factorization.

402938905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368 (or 1701 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 402938905 is about 20073.3381628468. The cubic root of 402938905 is about 738.6064013919.

The spelling of 402938905 in words is "four hundred two million, nine hundred thirty-eight thousand, nine hundred five".