406081690 has 32 divisors (see below), whose sum is σ = 836334720. Its totient is φ = 139066944.

The previous prime is 406081681. The next prime is 406081717. The reversal of 406081690 is 96180604.

It is a super-2 number, since 2×406081690² = 329804677906512200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68484 + ... + 74176.

It is an arithmetic number, because the mean of its divisors is an integer number (26135460).

Almost surely, 2^406081690 is an apocalyptic number.

406081690 is an abundant number, since it is smaller than the sum of its proper divisors (430253030).

406081690 is a wasteful number, since it uses less digits than its factorization.

406081690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6726.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 406081690 is about 20151.4686809672. The cubic root of 406081690 is about 740.5217224170.

The spelling of 406081690 in words is "four hundred six million, eighty-one thousand, six hundred ninety".