64490072 has 16 divisors (see below), whose sum is σ = 121009560. Its totient is φ = 32220864.

The previous prime is 64490071. The next prime is 64490131. The reversal of 64490072 is 27009446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64490071) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13868 + ... + 17924.

Almost surely, 2^64490072 is an apocalyptic number.

It is an amenable number.

64490072 is a deficient number, since it is larger than the sum of its proper divisors (56519488).

64490072 is a wasteful number, since it uses less digits than its factorization.

64490072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6050 (or 6046 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 64490072 is about 8030.5710880360. The cubic root of 64490072 is about 401.0183883459.

The spelling of 64490072 in words is "sixty-four million, four hundred ninety thousand, seventy-two".