31040896 has 32 divisors (see below), whose sum is σ = 62203680. Its totient is φ = 15429120.

The previous prime is 31040879. The next prime is 31040923. The reversal of 31040896 is 69804013.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24601 + ... + 25831.

It is an arithmetic number, because the mean of its divisors is an integer number (1943865).

Almost surely, 2^31040896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31040896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31101840).

31040896 is an abundant number, since it is smaller than the sum of its proper divisors (31162784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31040896 is a wasteful number, since it uses less digits than its factorization.

31040896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 31040896 is about 5571.4357216071. The cubic root of 31040896 is about 314.2761442186.

The spelling of 31040896 in words is "thirty-one million, forty thousand, eight hundred ninety-six".