2798621280 has 864 divisors, whose sum is σ = 12517019424. Its totient is φ = 585252864.

The previous prime is 2798621269. The next prime is 2798621291. The reversal of 2798621280 is 821268972.

2798621280 is a `hidden beast` number, since 279 + 86 + 21 + 280 = 666.

It is an interprime number because it is at equal distance from previous prime (2798621269) and next prime (2798621291).

It is a tau number, because it is divible by the number of its divisors (864).

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 143 ways as a sum of consecutive naturals, for example, 24766504 + ... + 24766616.

It is an arithmetic number, because the mean of its divisors is an integer number (14487291).

Almost surely, 2^2798621280 is an apocalyptic number.

2798621280 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 2798621280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6258509712).

2798621280 is an abundant number, since it is smaller than the sum of its proper divisors (9718398144).

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

2798621280 is a wasteful number, since it uses less digits than its factorization.

2798621280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 2798621280 is about 52901.9969377338. The cubic root of 2798621280 is about 1409.2283691057.

The spelling of 2798621280 in words is "two billion, seven hundred ninety-eight million, six hundred twenty-one thousand, two hundred eighty".