31838645 has 16 divisors (see below), whose sum is σ = 39164160. Its totient is φ = 24840000.

The previous prime is 31838621. The next prime is 31838669. The reversal of 31838645 is 54683813.

It is an interprime number because it is at equal distance from previous prime (31838621) and next prime (31838669).

It is not a de Polignac number, because 31838645 - 2¹⁴ = 31822261 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 31838599 and 31838608.

It is a congruent number.

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, 42020 + ... + 42770.

It is an arithmetic number, because the mean of its divisors is an integer number (2447760).

Almost surely, 2^31838645 is an apocalyptic number.

It is an amenable number.

31838645 is a deficient number, since it is larger than the sum of its proper divisors (7325515).

31838645 is a wasteful number, since it uses less digits than its factorization.

31838645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956.

The product of its digits is 69120, while the sum is 38.

The square root of 31838645 is about 5642.5743238348. The cubic root of 31838645 is about 316.9456961981.

The spelling of 31838645 in words is "thirty-one million, eight hundred thirty-eight thousand, six hundred forty-five".