31489144 has 16 divisors (see below), whose sum is σ = 59123520. Its totient is φ = 15722880.

The previous prime is 31489097. The next prime is 31489147. The reversal of 31489144 is 44198413.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31489147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4624 + ... + 9184.

It is an arithmetic number, because the mean of its divisors is an integer number (3695220).

Almost surely, 2^31489144 is an apocalyptic number.

It is an amenable number.

31489144 is a deficient number, since it is larger than the sum of its proper divisors (27634376).

31489144 is a wasteful number, since it uses less digits than its factorization.

31489144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5430 (or 5426 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 31489144 is about 5611.5188674725. The cubic root of 31489144 is about 315.7816950794.

The spelling of 31489144 in words is "thirty-one million, four hundred eighty-nine thousand, one hundred forty-four".