45728644 has 24 divisors (see below), whose sum is σ = 86365440. Its totient is φ = 21060384.

The previous prime is 45728591. The next prime is 45728677. The reversal of 45728644 is 44682754.

It is a happy number.

It is a super-2 number, since 2×45728644² = 4182217764157472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45728597 and 45728606.

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, 44367 + ... + 45385.

It is an arithmetic number, because the mean of its divisors is an integer number (3598560).

Almost surely, 2^45728644 is an apocalyptic number.

It is an amenable number.

45728644 is a deficient number, since it is larger than the sum of its proper divisors (40636796).

45728644 is a wasteful number, since it uses less digits than its factorization.

45728644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899 (or 1897 counting only the distinct ones).

The product of its digits is 215040, while the sum is 40.

The square root of 45728644 is about 6762.2957640139. The cubic root of 45728644 is about 357.5988453102.

The spelling of 45728644 in words is "forty-five million, seven hundred twenty-eight thousand, six hundred forty-four".