1099252080 has 80 divisors (see below), whose sum is σ = 3786320160. Its totient is φ = 293133312.

The previous prime is 1099252039. The next prime is 1099252081. The reversal of 1099252080 is 802529901.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099252081) 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, 252297 + ... + 256616.

It is an arithmetic number, because the mean of its divisors is an integer number (47329002).

Almost surely, 2^1099252080 is an apocalyptic number.

1099252080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1099252080 is an abundant number, since it is smaller than the sum of its proper divisors (2687068080).

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

1099252080 is a wasteful number, since it uses less digits than its factorization.

1099252080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508935 (or 508923 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1099252080 is about 33154.9706680612. The cubic root of 1099252080 is about 1032.0461039435.

The spelling of 1099252080 in words is "one billion, ninety-nine million, two hundred fifty-two thousand, eighty".