31474440 has 128 divisors (see below), whose sum is σ = 106156800. Its totient is φ = 8294400.

The previous prime is 31474433. The next prime is 31474481. The reversal of 31474440 is 4447413.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162984 + ... + 163176.

It is an arithmetic number, because the mean of its divisors is an integer number (829350).

Almost surely, 2^31474440 is an apocalyptic number.

31474440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31474440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53078400).

31474440 is an abundant number, since it is smaller than the sum of its proper divisors (74682360).

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

31474440 is a wasteful number, since it uses less digits than its factorization.

31474440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 31474440 is about 5610.2085522733. The cubic root of 31474440 is about 315.7325355239.

The spelling of 31474440 in words is "thirty-one million, four hundred seventy-four thousand, four hundred forty".