31412320 has 48 divisors (see below), whose sum is σ = 78125040. Its totient is φ = 11902464.

The previous prime is 31412299. The next prime is 31412321. The reversal of 31412320 is 2321413.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 31412294 and 31412303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31412321) 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, 2127 + ... + 8206.

It is an arithmetic number, because the mean of its divisors is an integer number (1627605).

Almost surely, 2^31412320 is an apocalyptic number.

It is an amenable number.

31412320 is an abundant number, since it is smaller than the sum of its proper divisors (46712720).

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

31412320 is a wasteful number, since it uses less digits than its factorization.

31412320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10367 (or 10359 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31412320 is about 5604.6694817803. The cubic root of 31412320 is about 315.5246819699.

Adding to 31412320 its reverse (2321413), we get a palindrome (33733733).

The spelling of 31412320 in words is "thirty-one million, four hundred twelve thousand, three hundred twenty".