89999988 has 48 divisors (see below), whose sum is σ = 226751616. Its totient is φ = 27619200.

The previous prime is 89999983. The next prime is 89999999. The reversal of 89999988 is 88999998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89999981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108945 + ... + 109767.

It is an arithmetic number, because the mean of its divisors is an integer number (4723992).

Almost surely, 2^89999988 is an apocalyptic number.

It is an amenable number.

89999988 is an abundant number, since it is smaller than the sum of its proper divisors (136751628).

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

89999988 is a wasteful number, since it uses less digits than its factorization.

89999988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 1542 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 69.

The square root of 89999988 is about 9486.8323480496. The cubic root of 89999988 is about 448.1404547384.

The spelling of 89999988 in words is "eighty-nine million, nine hundred ninety-nine thousand, nine hundred eighty-eight".