64289090 has 16 divisors (see below), whose sum is σ = 116746488. Its totient is φ = 25487616.

The previous prime is 64289089. The next prime is 64289111. The reversal of 64289090 is 9098246.

It can be written as a sum of positive squares in 4 ways, for example, as 19439281 + 44849809 = 4409^2 + 6697^2 .

It is a Curzon 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, 27317 + ... + 29576.

Almost surely, 2^64289090 is an apocalyptic number.

64289090 is a deficient number, since it is larger than the sum of its proper divisors (52457398).

64289090 is a wasteful number, since it uses less digits than its factorization.

64289090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57013.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 64289090 is about 8018.0477673808. The cubic root of 64289090 is about 400.6013662768.

The spelling of 64289090 in words is "sixty-four million, two hundred eighty-nine thousand, ninety".