31494144 has 104 divisors (see below), whose sum is σ = 92001312. Its totient is φ = 9502720.

The previous prime is 31494143. The next prime is 31494157. The reversal of 31494144 is 44149413.

It is a super-2 number, since 2×31494144² = 1983762212585472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31494143) 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, 135052 + ... + 135284.

It is an arithmetic number, because the mean of its divisors is an integer number (884628).

Almost surely, 2^31494144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31494144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46000656).

31494144 is an abundant number, since it is smaller than the sum of its proper divisors (60507168).

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

31494144 is a wasteful number, since it uses less digits than its factorization.

31494144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 249 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 31494144 is about 5611.9643619681. The cubic root of 31494144 is about 315.7984079811.

The spelling of 31494144 in words is "thirty-one million, four hundred ninety-four thousand, one hundred forty-four".