888949889 has 8 divisors (see below), whose sum is σ = 913680360. Its totient is φ = 864547200.

The previous prime is 888949877. The next prime is 888949913. The reversal of 888949889 is 988949888.

It can be written as a sum of positive squares in 4 ways, for example, as 110986225 + 777963664 = 10535^2 + 27892^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-888949889 is a prime.

It is a super-2 number, since 2×888949889² = 1580463810306224642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (888949189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76442 + ... + 87299.

It is an arithmetic number, because the mean of its divisors is an integer number (114210045).

Almost surely, 2^888949889 is an apocalyptic number.

888949889 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

888949889 is a deficient number, since it is larger than the sum of its proper divisors (24730471).

888949889 is a wasteful number, since it uses less digits than its factorization.

888949889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163891.

The product of its digits is 95551488, while the sum is 71.

The square root of 888949889 is about 29815.2626854100. The cubic root of 888949889 is about 961.5217073812.

Subtracting 888949889 from its reverse (988949888), we obtain a palindrome (99999999).

The spelling of 888949889 in words is "eight hundred eighty-eight million, nine hundred forty-nine thousand, eight hundred eighty-nine".