31285048 has 8 divisors (see below), whose sum is σ = 58659480. Its totient is φ = 15642520.

The previous prime is 31285043. The next prime is 31285061. The reversal of 31285048 is 84058213.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31285043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1955308 + ... + 1955323.

It is an arithmetic number, because the mean of its divisors is an integer number (7332435).

Almost surely, 2^31285048 is an apocalyptic number.

It is an amenable number.

31285048 is a deficient number, since it is larger than the sum of its proper divisors (27374432).

31285048 is a wasteful number, since it uses less digits than its factorization.

31285048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910637 (or 3910633 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 31285048 is about 5593.3038537165. The cubic root of 31285048 is about 315.0979723806.

The spelling of 31285048 in words is "thirty-one million, two hundred eighty-five thousand, forty-eight".