1888738340 has 12 divisors (see below), whose sum is σ = 3966350556. Its totient is φ = 755495328.

The previous prime is 1888738283. The next prime is 1888738343. The reversal of 1888738340 is 438378881.

It can be written as a sum of positive squares in 2 ways, for example, as 510398464 + 1378339876 = 22592^2 + 37126^2 .

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 not an unprimeable number, because it can be changed into a prime (1888738343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47218439 + ... + 47218478.

It is an arithmetic number, because the mean of its divisors is an integer number (330529213).

Almost surely, 2^1888738340 is an apocalyptic number.

1888738340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1888738340 is an abundant number, since it is smaller than the sum of its proper divisors (2077612216).

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

1888738340 is a wasteful number, since it uses less digits than its factorization.

1888738340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94436926 (or 94436924 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 50.

The square root of 1888738340 is about 43459.6173476021. The cubic root of 1888738340 is about 1236.1104143741.

The spelling of 1888738340 in words is "one billion, eight hundred eighty-eight million, seven hundred thirty-eight thousand, three hundred forty".