2621598990 has 32 divisors (see below), whose sum is σ = 6367648896. Its totient is φ = 690669600.

The previous prime is 2621598989. The next prime is 2621598997. The reversal of 2621598990 is 998951262.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621598997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523936 + ... + 528915.

It is an arithmetic number, because the mean of its divisors is an integer number (198989028).

Almost surely, 2^2621598990 is an apocalyptic number.

2621598990 is an abundant number, since it is smaller than the sum of its proper divisors (3746049906).

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

2621598990 is a wasteful number, since it uses less digits than its factorization.

2621598990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052944.

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 2621598990 is about 51201.5526131777. The cubic root of 2621598990 is about 1378.8660765103.

The spelling of 2621598990 in words is "two billion, six hundred twenty-one million, five hundred ninety-eight thousand, nine hundred ninety".