5111801928 has 48 divisors (see below), whose sum is σ = 14321864700. Its totient is φ = 1645176960.

The previous prime is 5111801923. The next prime is 5111801969. The reversal of 5111801928 is 8291081115.

It can be written as a sum of positive squares in 2 ways, for example, as 5032199844 + 79602084 = 70938^2 + 8922^2 .

It is a super-2 number, since 2×5111801928² = 52261037902209034368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 5111801892 and 5111801901.

It is not an unprimeable number, because it can be changed into a prime (5111801923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1222003 + ... + 1226178.

Almost surely, 2^5111801928 is an apocalyptic number.

5111801928 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

5111801928 is an abundant number, since it is smaller than the sum of its proper divisors (9210062772).

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

5111801928 is a wasteful number, since it uses less digits than its factorization.

5111801928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448222 (or 2448215 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 36.

The square root of 5111801928 is about 71496.8665607102. The cubic root of 5111801928 is about 1722.6273538000.

The spelling of 5111801928 in words is "five billion, one hundred eleven million, eight hundred one thousand, nine hundred twenty-eight".