31742330 has 16 divisors (see below), whose sum is σ = 57235464. Its totient is φ = 12674880.

The previous prime is 31742329. The next prime is 31742339. The reversal of 31742330 is 3324713.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27888961 + 3853369 = 5281^2 + 1963^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31742296 and 31742305.

It is not an unprimeable number, because it can be changed into a prime (31742339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4100 + ... + 8960.

Almost surely, 2^31742330 is an apocalyptic number.

31742330 is a deficient number, since it is larger than the sum of its proper divisors (25493134).

31742330 is a wasteful number, since it uses less digits than its factorization.

31742330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 31742330 is about 5634.0331912405. The cubic root of 31742330 is about 316.6257761914.

The spelling of 31742330 in words is "thirty-one million, seven hundred forty-two thousand, three hundred thirty".