2158729458 has 32 divisors (see below), whose sum is σ = 4516888320. Its totient is φ = 687085440.

The previous prime is 2158729453. The next prime is 2158729541. The reversal of 2158729458 is 8549278512.

It is a super-2 number, since 2×2158729458² = 9320225745673947528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2158729458.

It is not an unprimeable number, because it can be changed into a prime (2158729453) 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, 81793 + ... + 104916.

It is an arithmetic number, because the mean of its divisors is an integer number (141152760).

Almost surely, 2^2158729458 is an apocalyptic number.

2158729458 is an abundant number, since it is smaller than the sum of its proper divisors (2358158862).

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

2158729458 is a wasteful number, since it uses less digits than its factorization.

2158729458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186802.

The product of its digits is 1612800, while the sum is 51.

The square root of 2158729458 is about 46462.1292882709. The cubic root of 2158729458 is about 1292.4073106264.

The spelling of 2158729458 in words is "two billion, one hundred fifty-eight million, seven hundred twenty-nine thousand, four hundred fifty-eight".