99218770 has 64 divisors (see below), whose sum is σ = 211341312. Its totient is φ = 32832000.

The previous prime is 99218761. The next prime is 99218771. The reversal of 99218770 is 7781299.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (99218771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 519375 + ... + 519565.

It is an arithmetic number, because the mean of its divisors is an integer number (3302208).

Almost surely, 2^99218770 is an apocalyptic number.

99218770 is an abundant number, since it is smaller than the sum of its proper divisors (112122542).

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

99218770 is a wasteful number, since it uses less digits than its factorization.

99218770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 99218770 is about 9960.8619104975. The cubic root of 99218770 is about 462.9470058626.

The spelling of 99218770 in words is "ninety-nine million, two hundred eighteen thousand, seven hundred seventy".