31444001928 has 64 divisors (see below), whose sum is σ = 87360552000. Its totient is φ = 10479401856.

The previous prime is 31444001923. The next prime is 31444001959. The reversal of 31444001928 is 82910044413.

It is a happy number.

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 = 31444001892 and 31444001901.

It is not an unprimeable number, because it can be changed into a prime (31444001923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1620508 + ... + 1639796.

It is an arithmetic number, because the mean of its divisors is an integer number (1365008625).

Almost surely, 2^31444001928 is an apocalyptic number.

It is an amenable number.

31444001928 is an abundant number, since it is smaller than the sum of its proper divisors (55916550072).

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

31444001928 is a wasteful number, since it uses less digits than its factorization.

31444001928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26851 (or 26841 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 31444001928 in words is "thirty-one billion, four hundred forty-four million, one thousand, nine hundred twenty-eight".