1889118440 has 32 divisors (see below), whose sum is σ = 4636928160. Its totient is φ = 686952000.

The previous prime is 1889118433. The next prime is 1889118487. The reversal of 1889118440 is 448119881.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1889118391 and 1889118400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2146286 + ... + 2147165.

It is an arithmetic number, because the mean of its divisors is an integer number (144904005).

Almost surely, 2^1889118440 is an apocalyptic number.

1889118440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1889118440 is an abundant number, since it is smaller than the sum of its proper divisors (2747809720).

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

1889118440 is a wasteful number, since it uses less digits than its factorization.

1889118440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4293473 (or 4293469 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 44.

The square root of 1889118440 is about 43463.9901527690. The cubic root of 1889118440 is about 1236.1933293451.

The spelling of 1889118440 in words is "one billion, eight hundred eighty-nine million, one hundred eighteen thousand, four hundred forty".