78049814 has 16 divisors (see below), whose sum is σ = 122199840. Its totient is φ = 37352640.

The previous prime is 78049813. The next prime is 78049819. The reversal of 78049814 is 41894087.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78049813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4634 + ... + 13325.

It is an arithmetic number, because the mean of its divisors is an integer number (7637490).

Almost surely, 2^78049814 is an apocalyptic number.

78049814 is a deficient number, since it is larger than the sum of its proper divisors (44150026).

78049814 is a wasteful number, since it uses less digits than its factorization.

78049814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18055.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 78049814 is about 8834.5805786127. The cubic root of 78049814 is about 427.3568053179.

The spelling of 78049814 in words is "seventy-eight million, forty-nine thousand, eight hundred fourteen".