64528831 has 8 divisors (see below), whose sum is σ = 65748240. Its totient is φ = 63313728.

The previous prime is 64528819. The next prime is 64528843. The reversal of 64528831 is 13882546.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64528819) and next prime (64528843).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64528831 - 2¹⁷ = 64397759 is a prime.

It is a super-2 number, since 2×64528831² = 8327940060453122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64528801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58275 + ... + 59371.

It is an arithmetic number, because the mean of its divisors is an integer number (8218530).

Almost surely, 2^64528831 is an apocalyptic number.

64528831 is a deficient number, since it is larger than the sum of its proper divisors (1219409).

64528831 is a wasteful number, since it uses less digits than its factorization.

64528831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153.

The product of its digits is 46080, while the sum is 37.

The square root of 64528831 is about 8032.9839412263. The cubic root of 64528831 is about 401.0987105745.

The spelling of 64528831 in words is "sixty-four million, five hundred twenty-eight thousand, eight hundred thirty-one".