31049889 has 8 divisors (see below), whose sum is σ = 44584512. Its totient is φ = 19107600.

The previous prime is 31049861. The next prime is 31049899. The reversal of 31049889 is 98894013.

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

It is not a de Polignac number, because 31049889 - 2⁹ = 31049377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31049889.

It is not an unprimeable number, because it can be changed into a prime (31049899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398037 + ... + 398114.

It is an arithmetic number, because the mean of its divisors is an integer number (5573064).

Almost surely, 2^31049889 is an apocalyptic number.

31049889 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

31049889 is a deficient number, since it is larger than the sum of its proper divisors (13534623).

31049889 is a wasteful number, since it uses less digits than its factorization.

31049889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796167.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 31049889 is about 5572.2427262279. The cubic root of 31049889 is about 314.3064914147.

The spelling of 31049889 in words is "thirty-one million, forty-nine thousand, eight hundred eighty-nine".