64857828 has 48 divisors (see below), whose sum is σ = 178540544. Its totient is φ = 17932320.

The previous prime is 64857827. The next prime is 64857829. The reversal of 64857828 is 82875846.

It is an interprime number because it is at equal distance from previous prime (64857827) and next prime (64857829).

It is not an unprimeable number, because it can be changed into a prime (64857827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9850 + ... + 15057.

Almost surely, 2^64857828 is an apocalyptic number.

It is an amenable number.

64857828 is an abundant number, since it is smaller than the sum of its proper divisors (113682716).

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

64857828 is a wasteful number, since it uses less digits than its factorization.

64857828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24952 (or 24950 counting only the distinct ones).

The product of its digits is 860160, while the sum is 48.

The square root of 64857828 is about 8053.4357885315. The cubic root of 64857828 is about 401.7792159096.

The spelling of 64857828 in words is "sixty-four million, eight hundred fifty-seven thousand, eight hundred twenty-eight".