44400420 has 48 divisors (see below), whose sum is σ = 138136320. Its totient is φ = 11839968.

The previous prime is 44400403. The next prime is 44400443. The reversal of 44400420 is 2400444.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 44400393 and 44400402.

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, 40572 + ... + 41651.

It is an arithmetic number, because the mean of its divisors is an integer number (2877840).

Almost surely, 2^44400420 is an apocalyptic number.

It is an amenable number.

44400420 is an abundant number, since it is smaller than the sum of its proper divisors (93735900).

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

44400420 is a wasteful number, since it uses less digits than its factorization.

44400420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82241 (or 82233 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 44400420 is about 6663.3640152704. The cubic root of 44400420 is about 354.1025270394.

Adding to 44400420 its reverse (2400444), we get a palindrome (46800864).

The spelling of 44400420 in words is "forty-four million, four hundred thousand, four hundred twenty".