78687238 has 48 divisors (see below), whose sum is σ = 144460800. Its totient is φ = 32009040.

The previous prime is 78687199. The next prime is 78687247. The reversal of 78687238 is 83278687.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 78687191 and 78687200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179023 + ... + 179461.

It is an arithmetic number, because the mean of its divisors is an integer number (3009600).

Almost surely, 2^78687238 is an apocalyptic number.

78687238 is a deficient number, since it is larger than the sum of its proper divisors (65773562).

78687238 is a wasteful number, since it uses less digits than its factorization.

78687238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 538 counting only the distinct ones).

The product of its digits is 903168, while the sum is 49.

The square root of 78687238 is about 8870.5827317037. The cubic root of 78687238 is about 428.5170440726.

The spelling of 78687238 in words is "seventy-eight million, six hundred eighty-seven thousand, two hundred thirty-eight".