31038340 has 12 divisors (see below), whose sum is σ = 65180556. Its totient is φ = 12415328.

The previous prime is 31038331. The next prime is 31038349. The reversal of 31038340 is 4383013.

It is an interprime number because it is at equal distance from previous prime (31038331) and next prime (31038349).

It can be written as a sum of positive squares in 2 ways, for example, as 19909444 + 11128896 = 4462^2 + 3336^2 .

It is not an unprimeable number, because it can be changed into a prime (31038349) 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 3 ways as a sum of consecutive naturals, for example, 775939 + ... + 775978.

It is an arithmetic number, because the mean of its divisors is an integer number (5431713).

Almost surely, 2^31038340 is an apocalyptic number.

It is an amenable number.

31038340 is an abundant number, since it is smaller than the sum of its proper divisors (34142216).

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

31038340 is a wasteful number, since it uses less digits than its factorization.

31038340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551926 (or 1551924 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 31038340 is about 5571.2063325639. The cubic root of 31038340 is about 314.2675178367.

The spelling of 31038340 in words is "thirty-one million, thirty-eight thousand, three hundred forty".