1888398140 has 12 divisors (see below), whose sum is σ = 3965636136. Its totient is φ = 755359248.

The previous prime is 1888398089. The next prime is 1888398181. The reversal of 1888398140 is 418938881.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47209934 + ... + 47209973.

It is an arithmetic number, because the mean of its divisors is an integer number (330469678).

Almost surely, 2^1888398140 is an apocalyptic number.

1888398140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1888398140 is an abundant number, since it is smaller than the sum of its proper divisors (2077237996).

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

1888398140 is a wasteful number, since it uses less digits than its factorization.

1888398140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94419916 (or 94419914 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 50.

The square root of 1888398140 is about 43455.7031930217. The cubic root of 1888398140 is about 1236.0361937503.

The spelling of 1888398140 in words is "one billion, eight hundred eighty-eight million, three hundred ninety-eight thousand, one hundred forty".