97919940 has 96 divisors (see below), whose sum is σ = 282240000. Its totient is φ = 25356672.

The previous prime is 97919933. The next prime is 97919959. The reversal of 97919940 is 4991979.

It is a self number, because there is not a number n which added to its sum of digits gives 97919940.

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 31 ways as a sum of consecutive naturals, for example, 491961 + ... + 492159.

It is an arithmetic number, because the mean of its divisors is an integer number (2940000).

Almost surely, 2^97919940 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 97919940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141120000).

97919940 is an abundant number, since it is smaller than the sum of its proper divisors (184320060).

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

97919940 is a wasteful number, since it uses less digits than its factorization.

97919940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 48.

The square root of 97919940 is about 9895.4504697866. The cubic root of 97919940 is about 460.9180468626.

The spelling of 97919940 in words is "ninety-seven million, nine hundred nineteen thousand, nine hundred forty".