64247906 has 16 divisors (see below), whose sum is σ = 97675200. Its totient is φ = 31692720.

The previous prime is 64247881. The next prime is 64247927. The reversal of 64247906 is 60974246.

It is a self number, because there is not a number n which added to its sum of digits gives 64247906.

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, 49121 + ... + 50411.

It is an arithmetic number, because the mean of its divisors is an integer number (6104700).

Almost surely, 2^64247906 is an apocalyptic number.

64247906 is a deficient number, since it is larger than the sum of its proper divisors (33427294).

64247906 is a wasteful number, since it uses less digits than its factorization.

64247906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 64247906 is about 8015.4791497452. The cubic root of 64247906 is about 400.5158054094.

The spelling of 64247906 in words is "sixty-four million, two hundred forty-seven thousand, nine hundred six".