78780370 has 8 divisors (see below), whose sum is σ = 141804684. Its totient is φ = 31512144.

The previous prime is 78780367. The next prime is 78780391. The reversal of 78780370 is 7308787.

It can be written as a sum of positive squares in 2 ways, for example, as 73290721 + 5489649 = 8561^2 + 2343^2 .

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

It is an unprimeable number.

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, 3939009 + ... + 3939028.

Almost surely, 2^78780370 is an apocalyptic number.

78780370 is a deficient number, since it is larger than the sum of its proper divisors (63024314).

78780370 is a wasteful number, since it uses less digits than its factorization.

78780370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7878044.

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

The square root of 78780370 is about 8875.8306653518. The cubic root of 78780370 is about 428.6860376552.

The spelling of 78780370 in words is "seventy-eight million, seven hundred eighty thousand, three hundred seventy".