31138462 has 4 divisors (see below), whose sum is σ = 46707696. Its totient is φ = 15569230.

The previous prime is 31138447. The next prime is 31138517. The reversal of 31138462 is 26483113.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31138462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7784614 + ... + 7784617.

It is an arithmetic number, because the mean of its divisors is an integer number (11676924).

Almost surely, 2^31138462 is an apocalyptic number.

31138462 is a deficient number, since it is larger than the sum of its proper divisors (15569234).

31138462 is a wasteful number, since it uses less digits than its factorization.

31138462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15569233.

The product of its digits is 3456, while the sum is 28.

The square root of 31138462 is about 5580.1847639662. The cubic root of 31138462 is about 314.6050715424.

The spelling of 31138462 in words is "thirty-one million, one hundred thirty-eight thousand, four hundred sixty-two".