31420974 has 32 divisors (see below), whose sum is σ = 68350464. Its totient is φ = 9571680.

The previous prime is 31420969. The next prime is 31421009. The reversal of 31420974 is 47902413.

31420974 = T₁₆₆ + T₁₆₇ + ... + T₅₇₇.

It is a happy number.

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, 6079 + ... + 9989.

It is an arithmetic number, because the mean of its divisors is an integer number (2135952).

Almost surely, 2^31420974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31420974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34175232).

31420974 is an abundant number, since it is smaller than the sum of its proper divisors (36929490).

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

31420974 is a wasteful number, since it uses less digits than its factorization.

31420974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 31420974 is about 5605.4414634353. The cubic root of 31420974 is about 315.5536546775.

The spelling of 31420974 in words is "thirty-one million, four hundred twenty thousand, nine hundred seventy-four".