728627540 has 24 divisors (see below), whose sum is σ = 1531694472. Its totient is φ = 291150720.

The previous prime is 728627533. The next prime is 728627563. The reversal of 728627540 is 45726827.

It can be written as a sum of positive squares in 4 ways, for example, as 379236676 + 349390864 = 19474^2 + 18692^2 .

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, 1670 + ... + 38210.

It is an arithmetic number, because the mean of its divisors is an integer number (63820603).

Almost surely, 2^728627540 is an apocalyptic number.

It is an amenable number.

728627540 is an abundant number, since it is smaller than the sum of its proper divisors (803066932).

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

728627540 is a wasteful number, since it uses less digits than its factorization.

728627540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37547 (or 37545 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 728627540 is about 26993.1017113632. The cubic root of 728627540 is about 899.8466981686.

The spelling of 728627540 in words is "seven hundred twenty-eight million, six hundred twenty-seven thousand, five hundred forty".