31423044 has 12 divisors (see below), whose sum is σ = 73320464. Its totient is φ = 10474344.

The previous prime is 31423039. The next prime is 31423081. The reversal of 31423044 is 44032413.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 31423044.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309282 + ... + 1309305.

Almost surely, 2^31423044 is an apocalyptic number.

It is an amenable number.

31423044 is an abundant number, since it is smaller than the sum of its proper divisors (41897420).

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

31423044 is a wasteful number, since it uses less digits than its factorization.

31423044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618594 (or 2618592 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 31423044 is about 5605.6261024082. The cubic root of 31423044 is about 315.5605840375.

Adding to 31423044 its reverse (44032413), we get a palindrome (75455457).

The spelling of 31423044 in words is "thirty-one million, four hundred twenty-three thousand, forty-four".