31880138 has 8 divisors (see below), whose sum is σ = 50337120. Its totient is φ = 15101100.

The previous prime is 31880131. The next prime is 31880161. The reversal of 31880138 is 83108813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (31880131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419438 + ... + 419513.

It is an arithmetic number, because the mean of its divisors is an integer number (6292140).

Almost surely, 2^31880138 is an apocalyptic number.

31880138 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

31880138 is a deficient number, since it is larger than the sum of its proper divisors (18456982).

31880138 is a wasteful number, since it uses less digits than its factorization.

31880138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838972.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 31880138 is about 5646.2499059110. The cubic root of 31880138 is about 317.0833205534.

The spelling of 31880138 in words is "thirty-one million, eight hundred eighty thousand, one hundred thirty-eight".