97306638 has 128 divisors (see below), whose sum is σ = 247726080. Its totient is φ = 25038720.

The previous prime is 97306621. The next prime is 97306639. The reversal of 97306638 is 83660379.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 97306638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97306639) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 766131 + ... + 766257.

It is an arithmetic number, because the mean of its divisors is an integer number (1935360).

Almost surely, 2^97306638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97306638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123863040).

97306638 is an abundant number, since it is smaller than the sum of its proper divisors (150419442).

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

97306638 is a wasteful number, since it uses less digits than its factorization.

97306638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 97306638 is about 9864.4127042617. The cubic root of 97306638 is about 459.9537414100.

The spelling of 97306638 in words is "ninety-seven million, three hundred six thousand, six hundred thirty-eight".