78872242 has 8 divisors (see below), whose sum is σ = 118352556. Its totient is φ = 39421392.

The previous prime is 78872239. The next prime is 78872279. The reversal of 78872242 is 24227887.

It can be written as a sum of positive squares in 2 ways, for example, as 78872161 + 81 = 8881^2 + 9^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 78872195 and 78872204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428 + ... + 12640.

Almost surely, 2^78872242 is an apocalyptic number.

78872242 is a deficient number, since it is larger than the sum of its proper divisors (39480314).

78872242 is a wasteful number, since it uses less digits than its factorization.

78872242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14732.

The product of its digits is 100352, while the sum is 40.

The square root of 78872242 is about 8881.0045602961. The cubic root of 78872242 is about 428.8526144470.

The spelling of 78872242 in words is "seventy-eight million, eight hundred seventy-two thousand, two hundred forty-two".