78382899 has 18 divisors (see below), whose sum is σ = 131705340. Its totient is φ = 44789976.

The previous prime is 78382879. The next prime is 78382921. The reversal of 78382899 is 99828387.

It is not a de Polignac number, because 78382899 - 2⁵ = 78382867 is a prime.

It is a super-2 number, since 2×78382899² = 12287757711288402, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78382819) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 88429 + ... + 89310.

Almost surely, 2^78382899 is an apocalyptic number.

78382899 is a deficient number, since it is larger than the sum of its proper divisors (53322441).

78382899 is a wasteful number, since it uses less digits than its factorization.

78382899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177759 (or 177749 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 78382899 is about 8853.4117152655. The cubic root of 78382899 is about 427.9638711606.

The spelling of 78382899 in words is "seventy-eight million, three hundred eighty-two thousand, eight hundred ninety-nine".