77723642 has 8 divisors (see below), whose sum is σ = 122721600. Its totient is φ = 36816444.

The previous prime is 77723621. The next prime is 77723651. The reversal of 77723642 is 24632777.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 2045359 = 77723642 / (7 + 7 + 7 + 2 + 3 + 6 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 77723596 and 77723605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022642 + ... + 1022717.

It is an arithmetic number, because the mean of its divisors is an integer number (15340200).

Almost surely, 2^77723642 is an apocalyptic number.

77723642 is a deficient number, since it is larger than the sum of its proper divisors (44997958).

77723642 is a wasteful number, since it uses less digits than its factorization.

77723642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045380.

The product of its digits is 98784, while the sum is 38.

The square root of 77723642 is about 8816.1012925215. The cubic root of 77723642 is about 426.7606627489.

The spelling of 77723642 in words is "seventy-seven million, seven hundred twenty-three thousand, six hundred forty-two".