44855640 has 128 divisors (see below), whose sum is σ = 153316800. Its totient is φ = 11658240.

The previous prime is 44855611. The next prime is 44855651. The reversal of 44855640 is 4655844.

44855640 is a `hidden beast` number, since 4 + 4 + 8 + 5 + 5 + 640 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 44855595 and 44855604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43774 + ... + 44786.

Almost surely, 2^44855640 is an apocalyptic number.

44855640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44855640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76658400).

44855640 is an abundant number, since it is smaller than the sum of its proper divisors (108461160).

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

44855640 is a wasteful number, since it uses less digits than its factorization.

44855640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 44855640 is about 6697.4353300349. The cubic root of 44855640 is about 355.3085725438.

The spelling of 44855640 in words is "forty-four million, eight hundred fifty-five thousand, six hundred forty".