1888985842 has 4 divisors (see below), whose sum is σ = 2833478766. Its totient is φ = 944492920.

The previous prime is 1888985807. The next prime is 1888985851. The reversal of 1888985842 is 2485898881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2485898881 = 263 ⋅9452087.

It can be written as a sum of positive squares in only one way, i.e., 1825767441 + 63218401 = 42729^2 + 7951^2 .

It is a super-2 number, since 2×1888985842² = 7136535022552897928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472246459 + ... + 472246462.

Almost surely, 2^1888985842 is an apocalyptic number.

1888985842 is a deficient number, since it is larger than the sum of its proper divisors (944492924).

1888985842 is an equidigital number, since it uses as much as digits as its factorization.

1888985842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944492923.

The product of its digits is 11796480, while the sum is 61.

The square root of 1888985842 is about 43462.4647483320. The cubic root of 1888985842 is about 1236.1644056957.

The spelling of 1888985842 in words is "one billion, eight hundred eighty-eight million, nine hundred eighty-five thousand, eight hundred forty-two".