31420692 has 36 divisors (see below), whose sum is σ = 84098196. Its totient is φ = 9857280.

The previous prime is 31420687. The next prime is 31420693. The reversal of 31420692 is 29602413.

It can be written as a sum of positive squares in 2 ways, for example, as 25040016 + 6380676 = 5004^2 + 2526^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25059 + ... + 26282.

It is an arithmetic number, because the mean of its divisors is an integer number (2336061).

Almost surely, 2^31420692 is an apocalyptic number.

It is an amenable number.

31420692 is an abundant number, since it is smaller than the sum of its proper divisors (52677504).

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

31420692 is a wasteful number, since it uses less digits than its factorization.

31420692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51368 (or 51363 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 31420692 is about 5605.4163092495. The cubic root of 31420692 is about 315.5527106542.

The spelling of 31420692 in words is "thirty-one million, four hundred twenty thousand, six hundred ninety-two".