97991448 has 32 divisors (see below), whose sum is σ = 249134400. Its totient is φ = 32109728.

The previous prime is 97991447. The next prime is 97991449. The reversal of 97991448 is 84419979.

It is an interprime number because it is at equal distance from previous prime (97991447) and next prime (97991449).

It is a super-2 number, since 2×97991448² = 19204647762273408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 97991448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97991441) 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, 33186 + ... + 36017.

It is an arithmetic number, because the mean of its divisors is an integer number (7785450).

Almost surely, 2^97991448 is an apocalyptic number.

It is an amenable number.

97991448 is an abundant number, since it is smaller than the sum of its proper divisors (151142952).

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

97991448 is a wasteful number, since it uses less digits than its factorization.

97991448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69271 (or 69267 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The square root of 97991448 is about 9899.0629859598. The cubic root of 97991448 is about 461.0302177779.

The spelling of 97991448 in words is "ninety-seven million, nine hundred ninety-one thousand, four hundred forty-eight".