989703090 has 64 divisors (see below), whose sum is σ = 2642008320. Its totient is φ = 263640960.

The previous prime is 989703089. The next prime is 989703107. The reversal of 989703090 is 90307989.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 432750 + ... + 435030.

It is an arithmetic number, because the mean of its divisors is an integer number (41281380).

Almost surely, 2^989703090 is an apocalyptic number.

989703090 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

989703090 is an abundant number, since it is smaller than the sum of its proper divisors (1652305230).

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

989703090 is a wasteful number, since it uses less digits than its factorization.

989703090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904 (or 3898 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 989703090 is about 31459.5468816701. The cubic root of 989703090 is about 996.5558481028. Note that the first 3 decimals are identical.

The spelling of 989703090 in words is "nine hundred eighty-nine million, seven hundred three thousand, ninety".