3109400028 has 96 divisors (see below), whose sum is σ = 9755020800. Its totient is φ = 836137728.

The previous prime is 3109399973. The next prime is 3109400051. The reversal of 3109400028 is 8200049013.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 3109399974 and 3109400010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108118 + ... + 133821.

It is an arithmetic number, because the mean of its divisors is an integer number (101614800).

Almost surely, 2^3109400028 is an apocalyptic number.

It is an amenable number.

3109400028 is an abundant number, since it is smaller than the sum of its proper divisors (6645620772).

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

3109400028 is a wasteful number, since it uses less digits than its factorization.

3109400028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241976 (or 241968 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 3109400028 is about 55761.9944765250. The cubic root of 3109400028 is about 1459.5720313145.

The spelling of 3109400028 in words is "three billion, one hundred nine million, four hundred thousand, twenty-eight".