1915400028 has 24 divisors (see below), whose sum is σ = 4469989888. Its totient is φ = 638363376.

The previous prime is 1915400027. The next prime is 1915400063. The reversal of 1915400028 is 8200045191.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1915399968 and 1915400004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1915400027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115125 + ... + 130707.

Almost surely, 2^1915400028 is an apocalyptic number.

It is an amenable number.

1915400028 is an abundant number, since it is smaller than the sum of its proper divisors (2554589860).

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

1915400028 is a wasteful number, since it uses less digits than its factorization.

1915400028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25833 (or 25831 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 1915400028 is about 43765.2833647858. The cubic root of 1915400028 is about 1241.8996265227.

The spelling of 1915400028 in words is "one billion, nine hundred fifteen million, four hundred thousand, twenty-eight".