31234480 has 40 divisors (see below), whose sum is σ = 76446000. Its totient is φ = 11835648.

The previous prime is 31234451. The next prime is 31234481. The reversal of 31234480 is 8443213.

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

It is not an unprimeable number, because it can be changed into a prime (31234481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8755 + ... + 11794.

It is an arithmetic number, because the mean of its divisors is an integer number (1911150).

Almost surely, 2^31234480 is an apocalyptic number.

It is an amenable number.

31234480 is an abundant number, since it is smaller than the sum of its proper divisors (45211520).

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

31234480 is a wasteful number, since it uses less digits than its factorization.

31234480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20581 (or 20575 counting only the distinct ones).

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

The square root of 31234480 is about 5588.7816203534. The cubic root of 31234480 is about 314.9281099066.

Adding to 31234480 its reverse (8443213), we get a palindrome (39677693).

The spelling of 31234480 in words is "thirty-one million, two hundred thirty-four thousand, four hundred eighty".