78927825 has 24 divisors (see below), whose sum is σ = 131344768. Its totient is φ = 41820480.

The previous prime is 78927811. The next prime is 78927841. The reversal of 78927825 is 52872987.

It is not a de Polignac number, because 78927825 - 2⁹ = 78927313 is a prime.

It is a Duffinian 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, 8424 + ... + 15126.

Almost surely, 2^78927825 is an apocalyptic number.

78927825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78927825 is a deficient number, since it is larger than the sum of its proper divisors (52416943).

78927825 is a wasteful number, since it uses less digits than its factorization.

78927825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6873 (or 6868 counting only the distinct ones).

The product of its digits is 564480, while the sum is 48.

The square root of 78927825 is about 8884.1333285808. The cubic root of 78927825 is about 428.9533314082.

The spelling of 78927825 in words is "seventy-eight million, nine hundred twenty-seven thousand, eight hundred twenty-five".