78890158 has 16 divisors (see below), whose sum is σ = 121201920. Its totient is φ = 38494456.

The previous prime is 78890153. The next prime is 78890171. The reversal of 78890158 is 85109887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78890153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38385 + ... + 40387.

It is an arithmetic number, because the mean of its divisors is an integer number (7575120).

Almost surely, 2^78890158 is an apocalyptic number.

78890158 is a deficient number, since it is larger than the sum of its proper divisors (42311762).

78890158 is a wasteful number, since it uses less digits than its factorization.

78890158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471.

The product of its (nonzero) digits is 161280, while the sum is 46.

The square root of 78890158 is about 8882.0131726991. The cubic root of 78890158 is about 428.8850835877.

The spelling of 78890158 in words is "seventy-eight million, eight hundred ninety thousand, one hundred fifty-eight".