31342480 has 40 divisors (see below), whose sum is σ = 78479352. Its totient is φ = 11572224.

The previous prime is 31342463. The next prime is 31342481. The reversal of 31342480 is 8424313.

It can be written as a sum of positive squares in 4 ways, for example, as 473344 + 30869136 = 688^2 + 5556^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (31342481) 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, 14029 + ... + 16108.

Almost surely, 2^31342480 is an apocalyptic number.

It is an amenable number.

31342480 is an abundant number, since it is smaller than the sum of its proper divisors (47136872).

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

31342480 is a wasteful number, since it uses less digits than its factorization.

31342480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30163 (or 30157 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 31342480 is about 5598.4354957434. The cubic root of 31342480 is about 315.2906698023.

Adding to 31342480 its reverse (8424313), we get a palindrome (39766793).

The spelling of 31342480 in words is "thirty-one million, three hundred forty-two thousand, four hundred eighty".