78269825 has 12 divisors (see below), whose sum is σ = 97242288. Its totient is φ = 62494800.

The previous prime is 78269809. The next prime is 78269831. The reversal of 78269825 is 52896287.

It is not a de Polignac number, because 78269825 - 2⁴ = 78269809 is a prime.

It is a super-2 number, since 2×78269825² = 12252331011061250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78269825.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11534 + ... + 17016.

It is an arithmetic number, because the mean of its divisors is an integer number (8103524).

Almost surely, 2^78269825 is an apocalyptic number.

It is an amenable number.

78269825 is a deficient number, since it is larger than the sum of its proper divisors (18972463).

78269825 is a wasteful number, since it uses less digits than its factorization.

78269825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6064 (or 6059 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 78269825 is about 8847.0235107634. The cubic root of 78269825 is about 427.7579806934.

It can be divided in two parts, 782 and 69825, that added together give a palindrome (70607).

The spelling of 78269825 in words is "seventy-eight million, two hundred sixty-nine thousand, eight hundred twenty-five".