2981621880 has 64 divisors (see below), whose sum is σ = 9938743200. Its totient is φ = 795098880.

The previous prime is 2981621827. The next prime is 2981621897. The reversal of 2981621880 is 881261892.

It is a happy number.

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

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, 1379301 + ... + 1381460.

Almost surely, 2^2981621880 is an apocalyptic number.

2981621880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2981621880 is an abundant number, since it is smaller than the sum of its proper divisors (6957121320).

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

2981621880 is a wasteful number, since it uses less digits than its factorization.

2981621880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760781 (or 2760771 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 2981621880 is about 54604.2295065135. The cubic root of 2981621880 is about 1439.2984429845.

The spelling of 2981621880 in words is "two billion, nine hundred eighty-one million, six hundred twenty-one thousand, eight hundred eighty".