31407480 has 128 divisors (see below), whose sum is σ = 112795200. Its totient is φ = 7727616.

The previous prime is 31407479. The next prime is 31407491. The reversal of 31407480 is 8470413.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12922 + ... + 15158.

Almost surely, 2^31407480 is an apocalyptic number.

31407480 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 31407480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56397600).

31407480 is an abundant number, since it is smaller than the sum of its proper divisors (81387720).

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

31407480 is a wasteful number, since it uses less digits than its factorization.

31407480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 31407480 is about 5604.2376823258. The cubic root of 31407480 is about 315.5084758243.

Adding to 31407480 its reverse (8470413), we get a palindrome (39877893).

The spelling of 31407480 in words is "thirty-one million, four hundred seven thousand, four hundred eighty".