1888138550 has 12 divisors (see below), whose sum is σ = 3511937796. Its totient is φ = 755255400.

The previous prime is 1888138543. The next prime is 1888138559. The reversal of 1888138550 is 558318881.

It is a super-2 number, since 2×1888138550² = 7130134367992205000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1888138495 and 1888138504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1888138559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18881336 + ... + 18881435.

It is an arithmetic number, because the mean of its divisors is an integer number (292661483).

Almost surely, 2^1888138550 is an apocalyptic number.

1888138550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1888138550 is a deficient number, since it is larger than the sum of its proper divisors (1623799246).

1888138550 is a wasteful number, since it uses less digits than its factorization.

1888138550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37762783 (or 37762778 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 47.

The square root of 1888138550 is about 43452.7162557187. The cubic root of 1888138550 is about 1235.9795536219.

The spelling of 1888138550 in words is "one billion, eight hundred eighty-eight million, one hundred thirty-eight thousand, five hundred fifty".