97881440 has 48 divisors (see below), whose sum is σ = 233114112. Its totient is φ = 38836224.

The previous prime is 97881419. The next prime is 97881451. The reversal of 97881440 is 4418879.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17912 + ... + 22728.

It is an arithmetic number, because the mean of its divisors is an integer number (4856544).

Almost surely, 2^97881440 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 97881440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116557056).

97881440 is an abundant number, since it is smaller than the sum of its proper divisors (135232672).

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

97881440 is a wasteful number, since it uses less digits than its factorization.

97881440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4959 (or 4951 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 97881440 is about 9893.5049401110. The cubic root of 97881440 is about 460.8576312789.

The spelling of 97881440 in words is "ninety-seven million, eight hundred eighty-one thousand, four hundred forty".