99378 has 12 divisors (see below), whose sum is σ = 215358. Its totient is φ = 33120.

The previous prime is 99377. The next prime is 99391. The reversal of 99378 is 87399.

It can be written as a sum of positive squares in only one way, i.e., 91809 + 7569 = 303^2 + 87^2 .

It is not an unprimeable number, because it can be changed into a prime (99371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2743 + ... + 2778.

2⁹⁹³⁷⁸ is an apocalyptic number.

99378 is an abundant number, since it is smaller than the sum of its proper divisors (115980).

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

99378 is a wasteful number, since it uses less digits than its factorization.

99378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5529 (or 5526 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 99378 is about 315.2427635966. The cubic root of 99378 is about 46.3194525068.

The spelling of 99378 in words is "ninety-nine thousand, three hundred seventy-eight".