64933990 has 16 divisors (see below), whose sum is σ = 127506960. Its totient is φ = 23612320.

The previous prime is 64933969. The next prime is 64934003. The reversal of 64933990 is 9933946.

It is a happy 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, 295045 + ... + 295264.

It is an arithmetic number, because the mean of its divisors is an integer number (7969185).

Almost surely, 2^64933990 is an apocalyptic number.

64933990 is a deficient number, since it is larger than the sum of its proper divisors (62572970).

64933990 is a wasteful number, since it uses less digits than its factorization.

64933990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590327.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 64933990 is about 8058.1629420110. The cubic root of 64933990 is about 401.9364230373.

The spelling of 64933990 in words is "sixty-four million, nine hundred thirty-three thousand, nine hundred ninety".