78875447 has 24 divisors (see below), whose sum is σ = 97018560. Its totient is φ = 63833280.

The previous prime is 78875437. The next prime is 78875483. The reversal of 78875447 is 74457887.

It is not a de Polignac number, because 78875447 - 2⁶ = 78875383 is a prime.

It is a super-2 number, since 2×78875447² = 12442672278899618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78875395 and 78875404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78875437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66197 + ... + 67377.

It is an arithmetic number, because the mean of its divisors is an integer number (4042440).

Almost surely, 2^78875447 is an apocalyptic number.

78875447 is a deficient number, since it is larger than the sum of its proper divisors (18143113).

78875447 is a wasteful number, since it uses less digits than its factorization.

78875447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271 (or 1264 counting only the distinct ones).

The product of its digits is 1756160, while the sum is 50.

The square root of 78875447 is about 8881.1849997621. The cubic root of 78875447 is about 428.8584232250.

The spelling of 78875447 in words is "seventy-eight million, eight hundred seventy-five thousand, four hundred forty-seven".