2117538428 has 24 divisors (see below), whose sum is σ = 3926815200. Its totient is φ = 995691008.

The previous prime is 2117538389. The next prime is 2117538469. The reversal of 2117538428 is 8248357112.

It is a super-2 number, since 2×2117538428² = 8967937988113422368, which contains 22 as substring.

It is a congruent number.

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, 77888 + ... + 101496.

It is an arithmetic number, because the mean of its divisors is an integer number (163617300).

Almost surely, 2^2117538428 is an apocalyptic number.

It is an amenable number.

2117538428 is a deficient number, since it is larger than the sum of its proper divisors (1809276772).

2117538428 is a wasteful number, since it uses less digits than its factorization.

2117538428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24949 (or 24947 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 2117538428 is about 46016.7190051616. The cubic root of 2117538428 is about 1284.1342617988.

The spelling of 2117538428 in words is "two billion, one hundred seventeen million, five hundred thirty-eight thousand, four hundred twenty-eight".