97820556 has 24 divisors (see below), whose sum is σ = 229251120. Its totient is φ = 32463552.

The previous prime is 97820543. The next prime is 97820561. The reversal of 97820556 is 65502879.

It is a super-2 number, since 2×97820556² = 19137722352298272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15051 + ... + 20546.

It is an arithmetic number, because the mean of its divisors is an integer number (9552130).

Almost surely, 2^97820556 is an apocalyptic number.

It is an amenable number.

97820556 is an abundant number, since it is smaller than the sum of its proper divisors (131430564).

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

97820556 is a wasteful number, since it uses less digits than its factorization.

97820556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35833 (or 35831 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 97820556 is about 9890.4274932886. The cubic root of 97820556 is about 460.7620575735.

The spelling of 97820556 in words is "ninety-seven million, eight hundred twenty thousand, five hundred fifty-six".