44399540 has 12 divisors (see below), whose sum is σ = 93239076. Its totient is φ = 17759808.

The previous prime is 44399539. The next prime is 44399557. The reversal of 44399540 is 4599344.

It can be written as a sum of positive squares in 2 ways, for example, as 9872164 + 34527376 = 3142^2 + 5876^2 .

It is a junction number, because it is equal to n+sod(n) for n = 44399494 and 44399503.

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, 1109969 + ... + 1110008.

It is an arithmetic number, because the mean of its divisors is an integer number (7769923).

Almost surely, 2^44399540 is an apocalyptic number.

It is an amenable number.

44399540 is an abundant number, since it is smaller than the sum of its proper divisors (48839536).

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

44399540 is a wasteful number, since it uses less digits than its factorization.

44399540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219986 (or 2219984 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 44399540 is about 6663.2979822307. The cubic root of 44399540 is about 354.1001876299.

The spelling of 44399540 in words is "forty-four million, three hundred ninety-nine thousand, five hundred forty".