99747378 has 48 divisors (see below), whose sum is σ = 231828480. Its totient is φ = 30899232.

The previous prime is 99747377. The next prime is 99747379. The reversal of 99747378 is 87374799.

It is an interprime number because it is at equal distance from previous prime (99747377) and next prime (99747379).

It is not an unprimeable number, because it can be changed into a prime (99747377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15375 + ... + 20877.

It is an arithmetic number, because the mean of its divisors is an integer number (4829760).

Almost surely, 2^99747378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99747378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115914240).

99747378 is an abundant number, since it is smaller than the sum of its proper divisors (132081102).

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

99747378 is a wasteful number, since it uses less digits than its factorization.

99747378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5583 (or 5580 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 99747378 is about 9987.3609126736. The cubic root of 99747378 is about 463.7676979512.

The spelling of 99747378 in words is "ninety-nine million, seven hundred forty-seven thousand, three hundred seventy-eight".