31142648 has 8 divisors (see below), whose sum is σ = 58392480. Its totient is φ = 15571320.

The previous prime is 31142647. The next prime is 31142651. The reversal of 31142648 is 84624113.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31142648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1946408 + ... + 1946423.

It is an arithmetic number, because the mean of its divisors is an integer number (7299060).

Almost surely, 2^31142648 is an apocalyptic number.

It is an amenable number.

31142648 is a deficient number, since it is larger than the sum of its proper divisors (27249832).

31142648 is a wasteful number, since it uses less digits than its factorization.

31142648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892837 (or 3892833 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 31142648 is about 5580.5598285477. The cubic root of 31142648 is about 314.6191685544.

The spelling of 31142648 in words is "thirty-one million, one hundred forty-two thousand, six hundred forty-eight".