77443994 has 8 divisors (see below), whose sum is σ = 116230260. Its totient is φ = 38700576.

The previous prime is 77443991. The next prime is 77443999. The reversal of 77443994 is 49934477.

It can be written as a sum of positive squares in 2 ways, for example, as 73188025 + 4255969 = 8555^2 + 2063^2 .

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

It is not an unprimeable number, because it can be changed into a prime (77443991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5729 + ... + 13700.

Almost surely, 2^77443994 is an apocalyptic number.

77443994 is a deficient number, since it is larger than the sum of its proper divisors (38786266).

77443994 is a wasteful number, since it uses less digits than its factorization.

77443994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21424.

The product of its digits is 762048, while the sum is 47.

The square root of 77443994 is about 8800.2269288922. The cubic root of 77443994 is about 426.2482224308.

The spelling of 77443994 in words is "seventy-seven million, four hundred forty-three thousand, nine hundred ninety-four".