406564402 has 4 divisors (see below), whose sum is σ = 609846606. Its totient is φ = 203282200.

The previous prime is 406564393. The next prime is 406564421. The reversal of 406564402 is 204465604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 340808521 + 65755881 = 18461^2 + 8109^2 .

It is a super-2 number, since 2×406564402² = 330589225947235208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101641099 + ... + 101641102.

Almost surely, 2^406564402 is an apocalyptic number.

406564402 is a deficient number, since it is larger than the sum of its proper divisors (203282204).

406564402 is a wasteful number, since it uses less digits than its factorization.

406564402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203282203.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 406564402 is about 20163.4422160503. The cubic root of 406564402 is about 740.8150272586.

The spelling of 406564402 in words is "four hundred six million, five hundred sixty-four thousand, four hundred two".