31908401 has 8 divisors (see below), whose sum is σ = 36632064. Its totient is φ = 27226080.

The previous prime is 31908397. The next prime is 31908403. The reversal of 31908401 is 10480913.

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

It is not a de Polignac number, because 31908401 - 2² = 31908397 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31908403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8660 + ... + 11781.

It is an arithmetic number, because the mean of its divisors is an integer number (4579008).

Almost surely, 2^31908401 is an apocalyptic number.

It is an amenable number.

31908401 is a deficient number, since it is larger than the sum of its proper divisors (4723663).

31908401 is a wasteful number, since it uses less digits than its factorization.

31908401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20671.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 31908401 is about 5648.7521630888. The cubic root of 31908401 is about 317.1769951676.

The spelling of 31908401 in words is "thirty-one million, nine hundred eight thousand, four hundred one".