728126064 has 40 divisors (see below), whose sum is σ = 2089992720. Its totient is φ = 242708544.

The previous prime is 728126057. The next prime is 728126081. The reversal of 728126064 is 460621827.

It is a super-2 number, since 2×728126064² = 1060335130152264192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 842307 + ... + 843170.

It is an arithmetic number, because the mean of its divisors is an integer number (52249818).

Almost surely, 2^728126064 is an apocalyptic number.

It is an amenable number.

728126064 is an abundant number, since it is smaller than the sum of its proper divisors (1361866656).

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

728126064 is a wasteful number, since it uses less digits than its factorization.

728126064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685494 (or 1685482 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 728126064 is about 26983.8111466857. The cubic root of 728126064 is about 899.6402117441.

The spelling of 728126064 in words is "seven hundred twenty-eight million, one hundred twenty-six thousand, sixty-four".