2931398240 has 48 divisors (see below), whose sum is σ = 6943844880. Its totient is φ = 1169441280.

The previous prime is 2931398237. The next prime is 2931398257. The reversal of 2931398240 is 428931392.

2931398240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36470 + ... + 84810.

It is an arithmetic number, because the mean of its divisors is an integer number (144663435).

Almost surely, 2^2931398240 is an apocalyptic number.

2931398240 is a gapful number since it is divisible by the number (20) 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 2931398240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3471922440).

2931398240 is an abundant number, since it is smaller than the sum of its proper divisors (4012446640).

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

2931398240 is a wasteful number, since it uses less digits than its factorization.

2931398240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48735 (or 48727 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 2931398240 is about 54142.3885694010. The cubic root of 2931398240 is about 1431.1712639765.

The spelling of 2931398240 in words is "two billion, nine hundred thirty-one million, three hundred ninety-eight thousand, two hundred forty".