402626431 has 8 divisors (see below), whose sum is σ = 420336000. Its totient is φ = 384933912.

The previous prime is 402626429. The next prime is 402626467. The reversal of 402626431 is 134626204.

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

It is a cyclic number.

It is not a de Polignac number, because 402626431 - 2¹ = 402626429 is a prime.

It is a super-2 number, since 2×402626431² = 324216085879595522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402626431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402626491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77976 + ... + 82978.

It is an arithmetic number, because the mean of its divisors is an integer number (52542000).

Almost surely, 2^402626431 is an apocalyptic number.

402626431 is a deficient number, since it is larger than the sum of its proper divisors (17709569).

402626431 is a wasteful number, since it uses less digits than its factorization.

402626431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8525.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 402626431 is about 20065.5533439773. The cubic root of 402626431 is about 738.4154253910.

The spelling of 402626431 in words is "four hundred two million, six hundred twenty-six thousand, four hundred thirty-one".