78300778 has 8 divisors (see below), whose sum is σ = 119950272. Its totient is φ = 38317356.

The previous prime is 78300773. The next prime is 78300779. The reversal of 78300778 is 87700387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78300778² = 12262023670810568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78300778.

It is not an unprimeable number, because it can be changed into a prime (78300773) 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 3 ways as a sum of consecutive naturals, for example, 416400 + ... + 416587.

It is an arithmetic number, because the mean of its divisors is an integer number (14993784).

Almost surely, 2^78300778 is an apocalyptic number.

78300778 is a deficient number, since it is larger than the sum of its proper divisors (41649494).

78300778 is a wasteful number, since it uses less digits than its factorization.

78300778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833036.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 78300778 is about 8848.7726832595. The cubic root of 78300778 is about 427.8143610749.

The spelling of 78300778 in words is "seventy-eight million, three hundred thousand, seven hundred seventy-eight".