1911140028 has 48 divisors (see below), whose sum is σ = 5662639360. Its totient is φ = 546039792.

The previous prime is 1911140009. The next prime is 1911140039. The reversal of 1911140028 is 8200411191.

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 = 1911139983 and 1911140010.

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 15 ways as a sum of consecutive naturals, for example, 1263226 + ... + 1264737.

Almost surely, 2^1911140028 is an apocalyptic number.

1911140028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1911140028 is an abundant number, since it is smaller than the sum of its proper divisors (3751499332).

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

1911140028 is a wasteful number, since it uses less digits than its factorization.

1911140028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527983 (or 2527975 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1911140028 is about 43716.5875612450. The cubic root of 1911140028 is about 1240.9782490312.

The spelling of 1911140028 in words is "one billion, nine hundred eleven million, one hundred forty thousand, twenty-eight".