78870038 has 16 divisors (see below), whose sum is σ = 134900640. Its totient is φ = 34260096.

The previous prime is 78870037. The next prime is 78870061. The reversal of 78870038 is 83007887.

It is a junction number, because it is equal to n+sod(n) for n = 78869977 and 78870004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78870031) 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, 88778 + ... + 89661.

It is an arithmetic number, because the mean of its divisors is an integer number (8431290).

Almost surely, 2^78870038 is an apocalyptic number.

78870038 is a deficient number, since it is larger than the sum of its proper divisors (56030602).

78870038 is a wasteful number, since it uses less digits than its factorization.

78870038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178471.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 78870038 is about 8880.8804743674. The cubic root of 78870038 is about 428.8486198014.

The spelling of 78870038 in words is "seventy-eight million, eight hundred seventy thousand, thirty-eight".