78463251 has 12 divisors (see below), whose sum is σ = 114098400. Its totient is φ = 51956880.

The previous prime is 78463249. The next prime is 78463271. The reversal of 78463251 is 15236487.

It is not a de Polignac number, because 78463251 - 2¹ = 78463249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78463271) by changing a digit.

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, 27915 + ... + 30596.

It is an arithmetic number, because the mean of its divisors is an integer number (9508200).

Almost surely, 2^78463251 is an apocalyptic number.

78463251 is a deficient number, since it is larger than the sum of its proper divisors (35635149).

78463251 is a wasteful number, since it uses less digits than its factorization.

78463251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58666 (or 58663 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 78463251 is about 8857.9484645148. The cubic root of 78463251 is about 428.1100595493.

The spelling of 78463251 in words is "seventy-eight million, four hundred sixty-three thousand, two hundred fifty-one".