31144444400 has 30 divisors (see below), whose sum is σ = 74824528632. Its totient is φ = 12457777600.

The previous prime is 31144444337. The next prime is 31144444421. The reversal of 31144444400 is 444444113.

It is a congruent number.

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, 38930156 + ... + 38930955.

Almost surely, 2^31144444400 is an apocalyptic number.

It is an amenable number.

31144444400 is an abundant number, since it is smaller than the sum of its proper divisors (43680084232).

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

31144444400 is a wasteful number, since it uses less digits than its factorization.

31144444400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77861129 (or 77861118 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 31144444400 its reverse (444444113), we get a palindrome (31588888513).

The spelling of 31144444400 in words is "thirty-one billion, one hundred forty-four million, four hundred forty-four thousand, four hundred".