2938128985 has 16 divisors (see below), whose sum is σ = 3848046912. Its totient is φ = 2135838400.

The previous prime is 2938128971. The next prime is 2938129021. The reversal of 2938128985 is 5898218392.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2938128985 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121527 + ... + 143683.

It is an arithmetic number, because the mean of its divisors is an integer number (240502932).

Almost surely, 2^2938128985 is an apocalyptic number.

It is an amenable number.

2938128985 is a deficient number, since it is larger than the sum of its proper divisors (909917927).

2938128985 is a wasteful number, since it uses less digits than its factorization.

2938128985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24584.

The product of its digits is 2488320, while the sum is 55.

The square root of 2938128985 is about 54204.5107440331. The cubic root of 2938128985 is about 1432.2657912080.

The spelling of 2938128985 in words is "two billion, nine hundred thirty-eight million, one hundred twenty-eight thousand, nine hundred eighty-five".