2961391840 has 192 divisors, whose sum is σ = 8362388160. Its totient is φ = 978288640.

The previous prime is 2961391799. The next prime is 2961391843. The reversal of 2961391840 is 481931692.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2961391843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 865974 + ... + 869386.

It is an arithmetic number, because the mean of its divisors is an integer number (43554105).

Almost surely, 2^2961391840 is an apocalyptic number.

2961391840 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 2961391840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4181194080).

2961391840 is an abundant number, since it is smaller than the sum of its proper divisors (5400996320).

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

2961391840 is a wasteful number, since it uses less digits than its factorization.

2961391840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485 (or 3477 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 2961391840 is about 54418.6717956254. The cubic root of 2961391840 is about 1436.0358823342.

The spelling of 2961391840 in words is "two billion, nine hundred sixty-one million, three hundred ninety-one thousand, eight hundred forty".