2939781240 has 96 divisors (see below), whose sum is σ = 10422874800. Its totient is φ = 712673280.

The previous prime is 2939781193. The next prime is 2939781241. The reversal of 2939781240 is 421879392.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2939781241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 367225 + ... + 375144.

Almost surely, 2^2939781240 is an apocalyptic number.

2939781240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2939781240 is an abundant number, since it is smaller than the sum of its proper divisors (7483093560).

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

2939781240 is a wasteful number, since it uses less digits than its factorization.

2939781240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742397 (or 742390 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 2939781240 is about 54219.7495383370. The cubic root of 2939781240 is about 1432.5342188220.

The spelling of 2939781240 in words is "two billion, nine hundred thirty-nine million, seven hundred eighty-one thousand, two hundred forty".