31426616 has 32 divisors (see below), whose sum is σ = 65180640. Its totient is φ = 14110848.

The previous prime is 31426613. The next prime is 31426631. The reversal of 31426616 is 61662413.

It is a happy number.

It is a super-2 number, since 2×31426616² = 1975264386422912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31426613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236 + ... + 7931.

It is an arithmetic number, because the mean of its divisors is an integer number (2036895).

Almost surely, 2^31426616 is an apocalyptic number.

It is an amenable number.

31426616 is an abundant number, since it is smaller than the sum of its proper divisors (33754024).

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

31426616 is a wasteful number, since it uses less digits than its factorization.

31426616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8223 (or 8219 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 31426616 is about 5605.9447018322. The cubic root of 31426616 is about 315.5725406523.

The spelling of 31426616 in words is "thirty-one million, four hundred twenty-six thousand, six hundred sixteen".