64252890 has 48 divisors (see below), whose sum is σ = 179911368. Its totient is φ = 15815808.

The previous prime is 64252883. The next prime is 64252891. The reversal of 64252890 is 9825246.

It is a happy number.

64252890 is a `hidden beast` number, since 6 + 42 + 528 + 90 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 35319249 + 28933641 = 5943^2 + 5379^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64252891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26289 + ... + 28628.

Almost surely, 2^64252890 is an apocalyptic number.

64252890 is an abundant number, since it is smaller than the sum of its proper divisors (115658478).

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

64252890 is a wasteful number, since it uses less digits than its factorization.

64252890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54943 (or 54940 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 64252890 is about 8015.7900421605. The cubic root of 64252890 is about 400.5261617477.

The spelling of 64252890 in words is "sixty-four million, two hundred fifty-two thousand, eight hundred ninety".