31040838 has 48 divisors (see below), whose sum is σ = 69189120. Its totient is φ = 10054512.

The previous prime is 31040837. The next prime is 31040839. The reversal of 31040838 is 83804013.

It is an interprime number because it is at equal distance from previous prime (31040837) and next prime (31040839).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31040831) 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 23 ways as a sum of consecutive naturals, for example, 117895 + ... + 118157.

It is an arithmetic number, because the mean of its divisors is an integer number (1441440).

Almost surely, 2^31040838 is an apocalyptic number.

31040838 is an abundant number, since it is smaller than the sum of its proper divisors (38148282).

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

31040838 is a wasteful number, since it uses less digits than its factorization.

31040838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 31040838 is about 5571.4305164832. The cubic root of 31040838 is about 314.2759484766.

It can be divided in two parts, 31040 and 838, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 31040838 in words is "thirty-one million, forty thousand, eight hundred thirty-eight".