97820808 has 32 divisors (see below), whose sum is σ = 244805760. Its totient is φ = 32573120.

The previous prime is 97820783. The next prime is 97820809. The reversal of 97820808 is 80802879.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 97820808.

It is not an unprimeable number, because it can be changed into a prime (97820809) 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, 34318 + ... + 37058.

It is an arithmetic number, because the mean of its divisors is an integer number (7650180).

Almost surely, 2^97820808 is an apocalyptic number.

It is an amenable number.

97820808 is an abundant number, since it is smaller than the sum of its proper divisors (146984952).

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

97820808 is a wasteful number, since it uses less digits than its factorization.

97820808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237 (or 4233 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 97820808 is about 9890.4402328713. The cubic root of 97820808 is about 460.7624532365.

The spelling of 97820808 in words is "ninety-seven million, eight hundred twenty thousand, eight hundred eight".