97750638 has 48 divisors (see below), whose sum is σ = 221370240. Its totient is φ = 32326776.

The previous prime is 97750613. The next prime is 97750691. The reversal of 97750638 is 83605779.

It is a happy number.

97750638 is a `hidden beast` number, since 9 + 7 + 7 + 5 + 0 + 638 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 97750593 and 97750602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66831 + ... + 68277.

It is an arithmetic number, because the mean of its divisors is an integer number (4611880).

Almost surely, 2^97750638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97750638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110685120).

97750638 is an abundant number, since it is smaller than the sum of its proper divisors (123619602).

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

97750638 is a wasteful number, since it uses less digits than its factorization.

97750638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 97750638 is about 9886.8922316368. The cubic root of 97750638 is about 460.6522536585.

It can be divided in two parts, 977 and 50638, that added together give a palindrome (51615).

The spelling of 97750638 in words is "ninety-seven million, seven hundred fifty thousand, six hundred thirty-eight".