31042738 has 8 divisors (see below), whose sum is σ = 46611180. Its totient is φ = 15505680.

The previous prime is 31042729. The next prime is 31042757. The reversal of 31042738 is 83724013.

It can be written as a sum of positive squares in 2 ways, for example, as 30769209 + 273529 = 5547^2 + 523^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5193 + ... + 9436.

Almost surely, 2^31042738 is an apocalyptic number.

31042738 is a deficient number, since it is larger than the sum of its proper divisors (15568442).

31042738 is a wasteful number, since it uses less digits than its factorization.

31042738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15692.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 31042738 is about 5571.6010266350. The cubic root of 31042738 is about 314.2823605900.

The spelling of 31042738 in words is "thirty-one million, forty-two thousand, seven hundred thirty-eight".