1889135460 has 72 divisors (see below), whose sum is σ = 5942629056. Its totient is φ = 503768160.

The previous prime is 1889135447. The next prime is 1889135471. The reversal of 1889135460 is 645319881.

1889135460 is a `hidden beast` number, since 18 + 8 + 91 + 3 + 546 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189496 + ... + 199215.

Almost surely, 2^1889135460 is an apocalyptic number.

1889135460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1889135460 is an abundant number, since it is smaller than the sum of its proper divisors (4053493596).

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

1889135460 is a wasteful number, since it uses less digits than its factorization.

1889135460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388735 (or 388721 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1889135460 is about 43464.1859465929. The cubic root of 1889135460 is about 1236.1970418258.

The spelling of 1889135460 in words is "one billion, eight hundred eighty-nine million, one hundred thirty-five thousand, four hundred sixty".