44747840 has 28 divisors (see below), whose sum is σ = 106556556. Its totient is φ = 17899008.

The previous prime is 44747779. The next prime is 44747861. The reversal of 44747840 is 4874744.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15241216 + 29506624 = 3904^2 + 5432^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 44747794 and 44747803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69599 + ... + 70238.

Almost surely, 2^44747840 is an apocalyptic number.

44747840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44747840 is an abundant number, since it is smaller than the sum of its proper divisors (61808716).

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

44747840 is a wasteful number, since it uses less digits than its factorization.

44747840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139854 (or 139844 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 38.

The square root of 44747840 is about 6689.3826322016. The cubic root of 44747840 is about 355.0237106427.

The spelling of 44747840 in words is "forty-four million, seven hundred forty-seven thousand, eight hundred forty".