64867828 has 24 divisors (see below), whose sum is σ = 115403400. Its totient is φ = 31899648.

The previous prime is 64867819. The next prime is 64867837. The reversal of 64867828 is 82876846.

It is an interprime number because it is at equal distance from previous prime (64867819) and next prime (64867837).

It can be written as a sum of positive squares in 4 ways, for example, as 7683984 + 57183844 = 2772^2 + 7562^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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, 91138 + ... + 91846.

It is an arithmetic number, because the mean of its divisors is an integer number (4808475).

Almost surely, 2^64867828 is an apocalyptic number.

It is an amenable number.

64867828 is a deficient number, since it is larger than the sum of its proper divisors (50535572).

64867828 is a wasteful number, since it uses less digits than its factorization.

64867828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1057 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 64867828 is about 8054.0566176306. The cubic root of 64867828 is about 401.7998640760.

The spelling of 64867828 in words is "sixty-four million, eight hundred sixty-seven thousand, eight hundred twenty-eight".