2158923498 has 8 divisors (see below), whose sum is σ = 4317847008. Its totient is φ = 719641164.

The previous prime is 2158923493. The next prime is 2158923499. The reversal of 2158923498 is 8943298512.

It is a sphenic number, since it is the product of 3 distinct primes.

2158923498 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 2158923498.

It is not an unprimeable number, because it can be changed into a prime (2158923493) 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, 179910286 + ... + 179910297.

It is an arithmetic number, because the mean of its divisors is an integer number (539730876).

Almost surely, 2^2158923498 is an apocalyptic number.

2158923498 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2158923498 is a wasteful number, since it uses less digits than its factorization.

2158923498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359820588.

The product of its digits is 1244160, while the sum is 51.

The square root of 2158923498 is about 46464.2173936030. The cubic root of 2158923498 is about 1292.4460326627.

The spelling of 2158923498 in words is "two billion, one hundred fifty-eight million, nine hundred twenty-three thousand, four hundred ninety-eight".