77230978 has 8 divisors (see below), whose sum is σ = 126378000. Its totient is φ = 35104980.

The previous prime is 77230927. The next prime is 77230999. The reversal of 77230978 is 87903277.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1755228 + ... + 1755271.

It is an arithmetic number, because the mean of its divisors is an integer number (15797250).

Almost surely, 2^77230978 is an apocalyptic number.

77230978 is a deficient number, since it is larger than the sum of its proper divisors (49147022).

77230978 is a wasteful number, since it uses less digits than its factorization.

77230978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510512.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 77230978 is about 8788.1157252280. The cubic root of 77230978 is about 425.8570534371.

The spelling of 77230978 in words is "seventy-seven million, two hundred thirty thousand, nine hundred seventy-eight".