97097840 has 80 divisors (see below), whose sum is σ = 264358080. Its totient is φ = 32471040.

The previous prime is 97097839. The next prime is 97097851. The reversal of 97097840 is 4879079.

It is a tau number, because it is divible by the number of its divisors (80).

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 97097791 and 97097800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20846 + ... + 25074.

It is an arithmetic number, because the mean of its divisors is an integer number (3304476).

Almost surely, 2^97097840 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 97097840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132179040).

97097840 is an abundant number, since it is smaller than the sum of its proper divisors (167260240).

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

97097840 is a wasteful number, since it uses less digits than its factorization.

97097840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290 (or 4284 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 97097840 is about 9853.8236233454. The cubic root of 97097840 is about 459.6245203113.

The spelling of 97097840 in words is "ninety-seven million, ninety-seven thousand, eight hundred forty".