43620828736 has 21 divisors (see below), whose sum is σ = 86563397739. Its totient is φ = 21809578944.

The previous prime is 43620828709. The next prime is 43620828743. The reversal of 43620828736 is 63782802634.

It is a happy number.

The square root of 43620828736 is 208856.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43620828736.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1657795 + ... + 1683901.

It is an arithmetic number, because the mean of its divisors is an integer number (4122066559).

Almost surely, 2^43620828736 is an apocalyptic number.

43620828736 is the 208856-th square number.

It is an amenable number.

43620828736 is a deficient number, since it is larger than the sum of its proper divisors (42942569003).

43620828736 is an frugal number, since it uses more digits than its factorization.

43620828736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52226 (or 26109 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 49.

Multiplying 43620828736 by its sum of digits (49), we get a square (2137420608064 = 1461992²).

It can be divided in two parts, 43620 and 828736, that added together give a square (872356 = 934²).

The spelling of 43620828736 in words is "forty-three billion, six hundred twenty million, eight hundred twenty-eight thousand, seven hundred thirty-six".