44345640 has 64 divisors (see below), whose sum is σ = 137635200. Its totient is φ = 11416832.

The previous prime is 44345591. The next prime is 44345671. The reversal of 44345640 is 4654344.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 44345598 and 44345607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2892 + ... + 9851.

It is an arithmetic number, because the mean of its divisors is an integer number (2150550).

Almost surely, 2^44345640 is an apocalyptic number.

44345640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44345640 is an abundant number, since it is smaller than the sum of its proper divisors (93289560).

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

44345640 is a wasteful number, since it uses less digits than its factorization.

44345640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12786 (or 12782 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 44345640 is about 6659.2522102711. The cubic root of 44345640 is about 353.9568398337.

Adding to 44345640 its reverse (4654344), we get a palindrome (48999984).

The spelling of 44345640 in words is "forty-four million, three hundred forty-five thousand, six hundred forty".