2931280 has 40 divisors (see below), whose sum is σ = 7437024. Its totient is φ = 1065600.

The previous prime is 2931241. The next prime is 2931289. The reversal of 2931280 is 821392.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2931289) 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, 786 + ... + 2545.

2^2931280 is an apocalyptic number.

2931280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2931280 is an abundant number, since it is smaller than the sum of its proper divisors (4505744).

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

2931280 is a wasteful number, since it uses less digits than its factorization.

2931280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355 (or 3349 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2931280 is about 1712.0981280289. The cubic root of 2931280 is about 143.1152021286.

It can be divided in two parts, 29312 and 80, that added together give a palindrome (29392).

The spelling of 2931280 in words is "two million, nine hundred thirty-one thousand, two hundred eighty".