31040494 has 4 divisors (see below), whose sum is σ = 46560744. Its totient is φ = 15520246.

The previous prime is 31040489. The next prime is 31040533. The reversal of 31040494 is 49404013.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7760122 + ... + 7760125.

It is an arithmetic number, because the mean of its divisors is an integer number (11640186).

Almost surely, 2^31040494 is an apocalyptic number.

31040494 is a deficient number, since it is larger than the sum of its proper divisors (15520250).

31040494 is a wasteful number, since it uses less digits than its factorization.

31040494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15520249.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 31040494 is about 5571.3996446136. The cubic root of 31040494 is about 314.2747875186.

It can be divided in two parts, 310 and 40494, that added together give a palindrome (40804).

The spelling of 31040494 in words is "thirty-one million, forty thousand, four hundred ninety-four".