64828840 has 32 divisors (see below), whose sum is σ = 147213000. Its totient is φ = 25691904.

The previous prime is 64828793. The next prime is 64828859. The reversal of 64828840 is 4882846.

It can be written as a sum of positive squares in 4 ways, for example, as 49758916 + 15069924 = 7054^2 + 3882^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 64828793 and 64828802.

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, 3075 + ... + 11794.

Almost surely, 2^64828840 is an apocalyptic number.

It is an amenable number.

64828840 is an abundant number, since it is smaller than the sum of its proper divisors (82384160).

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

64828840 is a wasteful number, since it uses less digits than its factorization.

64828840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14989 (or 14985 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The square root of 64828840 is about 8051.6358586315. The cubic root of 64828840 is about 401.7193490086.

The spelling of 64828840 in words is "sixty-four million, eight hundred twenty-eight thousand, eight hundred forty".