2961620280 has 64 divisors (see below), whose sum is σ = 9872071200. Its totient is φ = 789765120.

The previous prime is 2961620261. The next prime is 2961620317. The reversal of 2961620280 is 820261692.

It is a happy number.

2961620280 is a `hidden beast` number, since 2 + 9 + 6 + 1 + 620 + 28 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1370041 + ... + 1372200.

Almost surely, 2^2961620280 is an apocalyptic number.

2961620280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2961620280 is an abundant number, since it is smaller than the sum of its proper divisors (6910450920).

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

2961620280 is a wasteful number, since it uses less digits than its factorization.

2961620280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742261 (or 2742251 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2961620280 is about 54420.7706670900. The cubic root of 2961620280 is about 1436.0728063685.

The spelling of 2961620280 in words is "two billion, nine hundred sixty-one million, six hundred twenty thousand, two hundred eighty".