402006436 has 12 divisors (see below), whose sum is σ = 757627612. Its totient is φ = 185541408.

The previous prime is 402006421. The next prime is 402006457. The reversal of 402006436 is 634600204.

It can be written as a sum of positive squares in 2 ways, for example, as 19412836 + 382593600 = 4406^2 + 19560^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 402006436.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3865395 + ... + 3865498.

Almost surely, 2^402006436 is an apocalyptic number.

It is an amenable number.

402006436 is a deficient number, since it is larger than the sum of its proper divisors (355621176).

402006436 is a wasteful number, since it uses less digits than its factorization.

402006436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7730910 (or 7730908 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 402006436 is about 20050.0981543732. The cubic root of 402006436 is about 738.0362078088.

The spelling of 402006436 in words is "four hundred two million, six thousand, four hundred thirty-six".