78997486 has 16 divisors (see below), whose sum is σ = 122549760. Its totient is φ = 38152440.

The previous prime is 78997483. The next prime is 78997543. The reversal of 78997486 is 68479987.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 78997486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78997483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47985 + ... + 49603.

It is an arithmetic number, because the mean of its divisors is an integer number (7659360).

Almost surely, 2^78997486 is an apocalyptic number.

78997486 is a deficient number, since it is larger than the sum of its proper divisors (43552274).

78997486 is a wasteful number, since it uses less digits than its factorization.

78997486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439.

The product of its digits is 6096384, while the sum is 58.

The square root of 78997486 is about 8888.0529926413. The cubic root of 78997486 is about 429.0794911046.

The spelling of 78997486 in words is "seventy-eight million, nine hundred ninety-seven thousand, four hundred eighty-six".