402591474 has 12 divisors (see below), whose sum is σ = 872281566. Its totient is φ = 134197152.

The previous prime is 402591463. The next prime is 402591479. The reversal of 402591474 is 474195204.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 382476249 + 20115225 = 19557^2 + 4485^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402591479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11183079 + ... + 11183114.

Almost surely, 2^402591474 is an apocalyptic number.

402591474 is an abundant number, since it is smaller than the sum of its proper divisors (469690092).

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

402591474 is a wasteful number, since it uses less digits than its factorization.

402591474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22366201 (or 22366198 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 402591474 is about 20064.6822551467. The cubic root of 402591474 is about 738.3940544351.

The spelling of 402591474 in words is "four hundred two million, five hundred ninety-one thousand, four hundred seventy-four".