99770000 has 100 divisors (see below), whose sum is σ = 263803056. Its totient is φ = 36240000.

The previous prime is 99769963. The next prime is 99770017. The reversal of 99770000 is 7799.

It is a tau number, because it is divible by the number of its divisors (100).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 109547 + ... + 110453.

Almost surely, 2^99770000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99770000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131901528).

99770000 is an abundant number, since it is smaller than the sum of its proper divisors (164033056).

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

99770000 is a wasteful number, since it uses less digits than its factorization.

99770000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 3969, while the sum is 32.

The square root of 99770000 is about 9988.4933798847. The cubic root of 99770000 is about 463.8027550459.

Adding to 99770000 its reverse (7799), we get a palindrome (99777799).

The spelling of 99770000 in words is "ninety-nine million, seven hundred seventy thousand".