440020400 has 30 divisors (see below), whose sum is σ = 1057149972. Its totient is φ = 176008000.

The previous prime is 440020397. The next prime is 440020459. The reversal of 440020400 is 4020044.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 549626 + ... + 550425.

Almost surely, 2^440020400 is an apocalyptic number.

440020400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

440020400 is an abundant number, since it is smaller than the sum of its proper divisors (617129572).

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

440020400 is a wasteful number, since it uses less digits than its factorization.

440020400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100069 (or 1100058 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 440020400 is about 20976.6632236874. The cubic root of 440020400 is about 760.6022465510.

Adding to 440020400 its reverse (4020044), we get a palindrome (444040444).

The spelling of 440020400 in words is "four hundred forty million, twenty thousand, four hundred".