64607990 has 16 divisors (see below), whose sum is σ = 123135552. Its totient is φ = 24322944.

The previous prime is 64607987. The next prime is 64608023. The reversal of 64607990 is 9970646.

It is a Curzon number.

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, 189854 + ... + 190193.

It is an arithmetic number, because the mean of its divisors is an integer number (7695972).

Almost surely, 2^64607990 is an apocalyptic number.

64607990 is a deficient number, since it is larger than the sum of its proper divisors (58527562).

64607990 is a wasteful number, since it uses less digits than its factorization.

64607990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380071.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 64607990 is about 8037.9095541067. The cubic root of 64607990 is about 401.2626558897.

The spelling of 64607990 in words is "sixty-four million, six hundred seven thousand, nine hundred ninety".