2621998080 has 352 divisors, whose sum is σ = 10041763200. Its totient is φ = 644972544.

The previous prime is 2621998063. The next prime is 2621998109. The reversal of 2621998080 is 808991262.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1796391 + ... + 1797849.

Almost surely, 2^2621998080 is an apocalyptic number.

2621998080 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 2621998080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5020881600).

2621998080 is an abundant number, since it is smaller than the sum of its proper divisors (7419765120).

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

2621998080 is a wasteful number, since it uses less digits than its factorization.

2621998080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506 (or 1482 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 2621998080 is about 51205.4497099674. The cubic root of 2621998080 is about 1378.9360419198.

The spelling of 2621998080 in words is "two billion, six hundred twenty-one million, nine hundred ninety-eight thousand, eighty".