44721864 has 48 divisors (see below), whose sum is σ = 132135120. Its totient is φ = 13551840.

The previous prime is 44721851. The next prime is 44721889. The reversal of 44721864 is 46812744.

44721864 is a `hidden beast` number, since 4 + 472 + 186 + 4 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27442 + ... + 29025.

It is an arithmetic number, because the mean of its divisors is an integer number (2752815).

Almost surely, 2^44721864 is an apocalyptic number.

44721864 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

44721864 is an abundant number, since it is smaller than the sum of its proper divisors (87413256).

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

44721864 is a wasteful number, since it uses less digits than its factorization.

44721864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56490 (or 56483 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 44721864 is about 6687.4407660928. The cubic root of 44721864 is about 354.9550005780.

It can be divided in two parts, 4472 and 1864, that added together give a palindrome (6336).

The spelling of 44721864 in words is "forty-four million, seven hundred twenty-one thousand, eight hundred sixty-four".