64732890 has 16 divisors (see below), whose sum is σ = 155359008. Its totient is φ = 17262096.

The previous prime is 64732883. The next prime is 64732897. The reversal of 64732890 is 9823746.

It is an interprime number because it is at equal distance from previous prime (64732883) and next prime (64732897).

It is not an unprimeable number, because it can be changed into a prime (64732897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1078852 + ... + 1078911.

It is an arithmetic number, because the mean of its divisors is an integer number (9709938).

Almost surely, 2^64732890 is an apocalyptic number.

64732890 is an abundant number, since it is smaller than the sum of its proper divisors (90626118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64732890 is a wasteful number, since it uses less digits than its factorization.

64732890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157773.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 64732890 is about 8045.6752358022. The cubic root of 64732890 is about 401.5210627553.

The spelling of 64732890 in words is "sixty-four million, seven hundred thirty-two thousand, eight hundred ninety".