31406742 has 12 divisors (see below), whose sum is σ = 68047980. Its totient is φ = 10468908.

The previous prime is 31406741. The next prime is 31406743. The reversal of 31406742 is 24760413.

It is an interprime number because it is at equal distance from previous prime (31406741) and next prime (31406743).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31406741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 872392 + ... + 872427.

It is an arithmetic number, because the mean of its divisors is an integer number (5670665).

Almost surely, 2^31406742 is an apocalyptic number.

31406742 is an abundant number, since it is smaller than the sum of its proper divisors (36641238).

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

31406742 is a wasteful number, since it uses less digits than its factorization.

31406742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744827 (or 1744824 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 31406742 is about 5604.1718389072. The cubic root of 31406742 is about 315.5060045756.

The spelling of 31406742 in words is "thirty-one million, four hundred six thousand, seven hundred forty-two".