78138160 has 20 divisors (see below), whose sum is σ = 181671408. Its totient is φ = 31255232.

The previous prime is 78138157. The next prime is 78138163. The reversal of 78138160 is 6183187.

It is an interprime number because it is at equal distance from previous prime (78138157) and next prime (78138163).

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×78138160² = 12211144096371200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78138163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488284 + ... + 488443.

Almost surely, 2^78138160 is an apocalyptic number.

It is an amenable number.

78138160 is an abundant number, since it is smaller than the sum of its proper divisors (103533248).

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

78138160 is a wasteful number, since it uses less digits than its factorization.

78138160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976740 (or 976734 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 78138160 is about 8839.5791755038. The cubic root of 78138160 is about 427.5179888239.

The spelling of 78138160 in words is "seventy-eight million, one hundred thirty-eight thousand, one hundred sixty".