97278240 has 96 divisors (see below), whose sum is σ = 313963776. Its totient is φ = 25303040.

The previous prime is 97278239. The next prime is 97278257. The reversal of 97278240 is 4287279.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

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, 17209 + ... + 22151.

It is an arithmetic number, because the mean of its divisors is an integer number (3270456).

Almost surely, 2^97278240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97278240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156981888).

97278240 is an abundant number, since it is smaller than the sum of its proper divisors (216685536).

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

97278240 is a wasteful number, since it uses less digits than its factorization.

97278240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002 (or 4994 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 97278240 is about 9862.9731825652. The cubic root of 97278240 is about 459.9089927082.

The spelling of 97278240 in words is "ninety-seven million, two hundred seventy-eight thousand, two hundred forty".