31057838 has 16 divisors (see below), whose sum is σ = 53517024. Its totient is φ = 13241760.

The previous prime is 31057813. The next prime is 31057847. The reversal of 31057838 is 83875013.

It is a junction number, because it is equal to n+sod(n) for n = 31057798 and 31057807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2873 + ... + 8388.

It is an arithmetic number, because the mean of its divisors is an integer number (3344814).

Almost surely, 2^31057838 is an apocalyptic number.

31057838 is a deficient number, since it is larger than the sum of its proper divisors (22459186).

31057838 is a wasteful number, since it uses less digits than its factorization.

31057838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11467.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 31057838 is about 5572.9559481482. The cubic root of 31057838 is about 314.3333107175. Note that the first 4 decimals are identical.

The spelling of 31057838 in words is "thirty-one million, fifty-seven thousand, eight hundred thirty-eight".