406615646 has 16 divisors (see below), whose sum is σ = 615720960. Its totient is φ = 201380760.

The previous prime is 406615633. The next prime is 406615679. The reversal of 406615646 is 646516604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258041 + ... + 259611.

It is an arithmetic number, because the mean of its divisors is an integer number (38482560).

Almost surely, 2^406615646 is an apocalyptic number.

406615646 is a deficient number, since it is larger than the sum of its proper divisors (209105314).

406615646 is a wasteful number, since it uses less digits than its factorization.

406615646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2719.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 406615646 is about 20164.7128915837. The cubic root of 406615646 is about 740.8461504380.

The spelling of 406615646 in words is "four hundred six million, six hundred fifteen thousand, six hundred forty-six".