77693444 has 12 divisors (see below), whose sum is σ = 138856704. Its totient is φ = 38020104.

The previous prime is 77693431. The next prime is 77693453. The reversal of 77693444 is 44439677.

77693444 = T₂₁₇ + T₂₁₈ + ... + T₇₈₀.

It is a super-2 number, since 2×77693444² = 12072542481162272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77693395 and 77693404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206444 + ... + 206819.

It is an arithmetic number, because the mean of its divisors is an integer number (11571392).

Almost surely, 2^77693444 is an apocalyptic number.

It is an amenable number.

77693444 is a deficient number, since it is larger than the sum of its proper divisors (61163260).

77693444 is a wasteful number, since it uses less digits than its factorization.

77693444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413314 (or 413312 counting only the distinct ones).

The product of its digits is 508032, while the sum is 44.

The square root of 77693444 is about 8814.3884643235. The cubic root of 77693444 is about 426.7053857549.

The spelling of 77693444 in words is "seventy-seven million, six hundred ninety-three thousand, four hundred forty-four".