31380538 has 32 divisors (see below), whose sum is σ = 57715200. Its totient is φ = 12489984.

The previous prime is 31380529. The next prime is 31380541. The reversal of 31380538 is 83508313.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17968 + ... + 19636.

It is an arithmetic number, because the mean of its divisors is an integer number (1803600).

Almost surely, 2^31380538 is an apocalyptic number.

31380538 is a deficient number, since it is larger than the sum of its proper divisors (26334662).

31380538 is a wasteful number, since it uses less digits than its factorization.

31380538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 31380538 is about 5601.8334498626. The cubic root of 31380538 is about 315.4182334029.

The spelling of 31380538 in words is "thirty-one million, three hundred eighty thousand, five hundred thirty-eight".