78197286 has 32 divisors (see below), whose sum is σ = 164332800. Its totient is φ = 24758624.

The previous prime is 78197279. The next prime is 78197299. The reversal of 78197286 is 68279187.

It is a super-2 number, since 2×78197286² = 12229631075531592, which contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 18661 + ... + 22463.

It is an arithmetic number, because the mean of its divisors is an integer number (5135400).

Almost surely, 2^78197286 is an apocalyptic number.

78197286 is an abundant number, since it is smaller than the sum of its proper divisors (86135514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78197286 is a wasteful number, since it uses less digits than its factorization.

78197286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980.

The product of its digits is 338688, while the sum is 48.

The square root of 78197286 is about 8842.9229330578. The cubic root of 78197286 is about 427.6257938349.

The spelling of 78197286 in words is "seventy-eight million, one hundred ninety-seven thousand, two hundred eighty-six".