31484385 has 48 divisors (see below), whose sum is σ = 57081024. Its totient is φ = 16039296.

The previous prime is 31484377. The next prime is 31484413. The reversal of 31484385 is 58348413.

It is not a de Polignac number, because 31484385 - 2³ = 31484377 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102402 + ... + 102708.

It is an arithmetic number, because the mean of its divisors is an integer number (1189188).

Almost surely, 2^31484385 is an apocalyptic number.

It is an amenable number.

31484385 is a deficient number, since it is larger than the sum of its proper divisors (25596639).

31484385 is a wasteful number, since it uses less digits than its factorization.

31484385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414 (or 411 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 31484385 is about 5611.0948129576. The cubic root of 31484385 is about 315.7657860960.

It can be divided in two parts, 31 and 484385, that added together give a square (484416 = 696²).

The spelling of 31484385 in words is "thirty-one million, four hundred eighty-four thousand, three hundred eighty-five".