44399820420 has 144 divisors (see below), whose sum is σ = 135662567040. Its totient is φ = 11753856000.

The previous prime is 44399820343. The next prime is 44399820469. The reversal of 44399820420 is 2402899344.

It is a happy number.

44399820420 is a `hidden beast` number, since 4 + 439 + 9 + 8 + 204 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15571995 + ... + 15574845.

It is an arithmetic number, because the mean of its divisors is an integer number (942101160).

Almost surely, 2^44399820420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44399820420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67831283520).

44399820420 is an abundant number, since it is smaller than the sum of its proper divisors (91262746620).

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

44399820420 is a wasteful number, since it uses less digits than its factorization.

44399820420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466 (or 3461 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 44399820420 in words is "forty-four billion, three hundred ninety-nine million, eight hundred twenty thousand, four hundred twenty".