64020028 has 12 divisors (see below), whose sum is σ = 118625472. Its totient is φ = 30127040.

The previous prime is 64020013. The next prime is 64020031. The reversal of 64020028 is 82002046.

It is a junction number, because it is equal to n+sod(n) for n = 64019990 and 64020008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470668 + ... + 470803.

It is an arithmetic number, because the mean of its divisors is an integer number (9885456).

Almost surely, 2^64020028 is an apocalyptic number.

64020028 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

64020028 is a deficient number, since it is larger than the sum of its proper divisors (54605444).

64020028 is a wasteful number, since it uses less digits than its factorization.

64020028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941492 (or 941490 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 64020028 is about 8001.2516520854. The cubic root of 64020028 is about 400.0417206483.

The spelling of 64020028 in words is "sixty-four million, twenty thousand, twenty-eight".