7128923100 has 72 divisors (see below), whose sum is σ = 22213005360. Its totient is φ = 1754810880.

The previous prime is 7128923083. The next prime is 7128923143. The reversal of 7128923100 is 13298217.

It is a super-2 number, since 2×7128923100² (a number of 21 digits) 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 23 ways as a sum of consecutive naturals, for example, 910065 + ... + 917864.

Almost surely, 2^7128923100 is an apocalyptic number.

It is an amenable number.

7128923100 is an abundant number, since it is smaller than the sum of its proper divisors (15084082260).

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

7128923100 is a wasteful number, since it uses less digits than its factorization.

7128923100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827959 (or 1827952 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 7128923100 is about 84432.9503215421. The cubic root of 7128923100 is about 1924.6036717106.

The spelling of 7128923100 in words is "seven billion, one hundred twenty-eight million, nine hundred twenty-three thousand, one hundred".