8820402491 has 4 divisors (see below), whose sum is σ = 8944633584. Its totient is φ = 8696171400.

The previous prime is 8820402469. The next prime is 8820402511. The reversal of 8820402491 is 1942040288.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8820402491 - 2¹⁰ = 8820401467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8820402401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62115440 + ... + 62115581.

It is an arithmetic number, because the mean of its divisors is an integer number (2236158396).

Almost surely, 2^8820402491 is an apocalyptic number.

8820402491 is a deficient number, since it is larger than the sum of its proper divisors (124231093).

8820402491 is a wasteful number, since it uses less digits than its factorization.

8820402491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124231092.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 8820402491 is about 93916.9978811078. The cubic root of 8820402491 is about 2066.1545362336.

The spelling of 8820402491 in words is "eight billion, eight hundred twenty million, four hundred two thousand, four hundred ninety-one".