77390234 has 4 divisors (see below), whose sum is σ = 116085354. Its totient is φ = 38695116.

The previous prime is 77390233. The next prime is 77390237. The reversal of 77390234 is 43209377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43209377 = 37 ⋅1167821.

It can be written as a sum of positive squares in only one way, i.e., 77387209 + 3025 = 8797^2 + 55^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77390194 and 77390203.

It is not an unprimeable number, because it can be changed into a prime (77390231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19347557 + ... + 19347560.

Almost surely, 2^77390234 is an apocalyptic number.

77390234 is a deficient number, since it is larger than the sum of its proper divisors (38695120).

77390234 is a wasteful number, since it uses less digits than its factorization.

77390234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38695119.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 77390234 is about 8797.1719319336. The cubic root of 77390234 is about 426.1495687341.

The spelling of 77390234 in words is "seventy-seven million, three hundred ninety thousand, two hundred thirty-four".