77387938 has 8 divisors (see below), whose sum is σ = 116153388. Its totient is φ = 38670144.

The previous prime is 77387911. The next prime is 77387963. The reversal of 77387938 is 83978377.

It can be written as a sum of positive squares in 2 ways, for example, as 77387209 + 729 = 8797^2 + 27^2 .

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, 7531 + ... + 14542.

Almost surely, 2^77387938 is an apocalyptic number.

77387938 is a deficient number, since it is larger than the sum of its proper divisors (38765450).

77387938 is a wasteful number, since it uses less digits than its factorization.

77387938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23828.

The product of its digits is 1778112, while the sum is 52.

The square root of 77387938 is about 8797.0414344824. The cubic root of 77387938 is about 426.1453543820.

The spelling of 77387938 in words is "seventy-seven million, three hundred eighty-seven thousand, nine hundred thirty-eight".