78780746 has 8 divisors (see below), whose sum is σ = 128913984. Its totient is φ = 35809420.

The previous prime is 78780743. The next prime is 78780763. The reversal of 78780746 is 64708787.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78780746.

It is not an unprimeable number, because it can be changed into a prime (78780743) 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 3 ways as a sum of consecutive naturals, for example, 1790450 + ... + 1790493.

It is an arithmetic number, because the mean of its divisors is an integer number (16114248).

Almost surely, 2^78780746 is an apocalyptic number.

78780746 is a deficient number, since it is larger than the sum of its proper divisors (50133238).

78780746 is a wasteful number, since it uses less digits than its factorization.

78780746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580956.

The product of its (nonzero) digits is 526848, while the sum is 47.

The square root of 78780746 is about 8875.8518464427. The cubic root of 78780746 is about 428.6867196597.

The spelling of 78780746 in words is "seventy-eight million, seven hundred eighty thousand, seven hundred forty-six".