44400040 has 32 divisors (see below), whose sum is σ = 100575360. Its totient is φ = 17640000.

The previous prime is 44400023. The next prime is 44400047. The reversal of 44400040 is 4000444.

44400040 = 305² + 306² + ... + 544².

It is a junction number, because it is equal to n+sod(n) for n = 44399987 and 44400023.

It is not an unprimeable number, because it can be changed into a prime (44400047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2365 + ... + 9715.

It is an arithmetic number, because the mean of its divisors is an integer number (3142980).

Almost surely, 2^44400040 is an apocalyptic number.

44400040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44400040 is an abundant number, since it is smaller than the sum of its proper divisors (56175320).

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

44400040 is a wasteful number, since it uses less digits than its factorization.

44400040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7513 (or 7509 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 44400040 is about 6663.3355010835. The cubic root of 44400040 is about 354.1015168436.

Adding to 44400040 its reverse (4000444), we get a palindrome (48400484).

It can be divided in two parts, 4 and 4400040, that added together give a palindrome (4400044).

The spelling of 44400040 in words is "forty-four million, four hundred thousand, forty".