97800220 has 48 divisors (see below), whose sum is σ = 247080960. Its totient is φ = 31765824.

The previous prime is 97800203. The next prime is 97800223. The reversal of 97800220 is 2200879.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97800223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15724 + ... + 21043.

It is an arithmetic number, because the mean of its divisors is an integer number (5147520).

Almost surely, 2^97800220 is an apocalyptic number.

It is an amenable number.

97800220 is an abundant number, since it is smaller than the sum of its proper divisors (149280740).

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

97800220 is a wasteful number, since it uses less digits than its factorization.

97800220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36802 (or 36800 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 97800220 is about 9889.3993750885. The cubic root of 97800220 is about 460.7301259530.

The spelling of 97800220 in words is "ninety-seven million, eight hundred thousand, two hundred twenty".