31077340 has 48 divisors (see below), whose sum is σ = 76188672. Its totient is φ = 10426176.

The previous prime is 31077311. The next prime is 31077353. The reversal of 31077340 is 4377013.

It is a happy number.

It is a super-2 number, since 2×31077340² = 1931602122951200, which contains 22 as substring.

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, 4219 + ... + 8941.

It is an arithmetic number, because the mean of its divisors is an integer number (1587264).

Almost surely, 2^31077340 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 31077340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38094336).

31077340 is an abundant number, since it is smaller than the sum of its proper divisors (45111332).

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

31077340 is a wasteful number, since it uses less digits than its factorization.

31077340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4786 (or 4784 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 31077340 is about 5574.7053733807. The cubic root of 31077340 is about 314.3990895566.

The spelling of 31077340 in words is "thirty-one million, seventy-seven thousand, three hundred forty".