31423734 has 16 divisors (see below), whose sum is σ = 69830640. Its totient is φ = 10474560.

The previous prime is 31423729. The next prime is 31423747. The reversal of 31423734 is 43732413.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31423698 and 31423707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290907 + ... + 291014.

It is an arithmetic number, because the mean of its divisors is an integer number (4364415).

Almost surely, 2^31423734 is an apocalyptic number.

31423734 is an abundant number, since it is smaller than the sum of its proper divisors (38406906).

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

31423734 is a wasteful number, since it uses less digits than its factorization.

31423734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581932 (or 581926 counting only the distinct ones).

The product of its digits is 6048, while the sum is 27.

The square root of 31423734 is about 5605.6876473810. The cubic root of 31423734 is about 315.5628937566.

The spelling of 31423734 in words is "thirty-one million, four hundred twenty-three thousand, seven hundred thirty-four".