31877412 has 48 divisors (see below), whose sum is σ = 85478400. Its totient is φ = 9057312.

The previous prime is 31877411. The next prime is 31877423. The reversal of 31877412 is 21477813.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31877411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15763 + ... + 17669.

It is an arithmetic number, because the mean of its divisors is an integer number (1780800).

Almost surely, 2^31877412 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 31877412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42739200).

31877412 is an abundant number, since it is smaller than the sum of its proper divisors (53600988).

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

31877412 is a wasteful number, since it uses less digits than its factorization.

31877412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120 (or 2118 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 31877412 is about 5646.0085015876. The cubic root of 31877412 is about 317.0742825983.

The spelling of 31877412 in words is "thirty-one million, eight hundred seventy-seven thousand, four hundred twelve".