2158354938 has 16 divisors (see below), whose sum is σ = 4375843776. Its totient is φ = 709596000.

The previous prime is 2158354909. The next prime is 2158354963. The reversal of 2158354938 is 8394538512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2463438 + ... + 2464313.

It is an arithmetic number, because the mean of its divisors is an integer number (273490236).

Almost surely, 2^2158354938 is an apocalyptic number.

2158354938 is an abundant number, since it is smaller than the sum of its proper divisors (2217488838).

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

2158354938 is a wasteful number, since it uses less digits than its factorization.

2158354938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4927829.

The product of its digits is 1036800, while the sum is 48.

The square root of 2158354938 is about 46458.0987342358. The cubic root of 2158354938 is about 1292.3325659846.

The spelling of 2158354938 in words is "two billion, one hundred fifty-eight million, three hundred fifty-four thousand, nine hundred thirty-eight".