77238946 has 4 divisors (see below), whose sum is σ = 115858422. Its totient is φ = 38619472.

The previous prime is 77238923. The next prime is 77238961. The reversal of 77238946 is 64983277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64983277 = 43 ⋅1511239.

It can be written as a sum of positive squares in only one way, i.e., 51279921 + 25959025 = 7161^2 + 5095^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77238896 and 77238905.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 19309735 + ... + 19309738.

Almost surely, 2^77238946 is an apocalyptic number.

77238946 is a deficient number, since it is larger than the sum of its proper divisors (38619476).

77238946 is a wasteful number, since it uses less digits than its factorization.

77238946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38619475.

The product of its digits is 508032, while the sum is 46.

The square root of 77238946 is about 8788.5690530370. The cubic root of 77238946 is about 425.8716983045.

The spelling of 77238946 in words is "seventy-seven million, two hundred thirty-eight thousand, nine hundred forty-six".