424139866 has 4 divisors (see below), whose sum is σ = 636209802. Its totient is φ = 212069932.

The previous prime is 424139857. The next prime is 424139921. The reversal of 424139866 is 668931424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 296562841 + 127577025 = 17221^2 + 11295^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106034965 + ... + 106034968.

Almost surely, 2^424139866 is an apocalyptic number.

424139866 is a deficient number, since it is larger than the sum of its proper divisors (212069936).

424139866 is a wasteful number, since it uses less digits than its factorization.

424139866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212069935.

The product of its digits is 248832, while the sum is 43.

The square root of 424139866 is about 20594.6562486486. The cubic root of 424139866 is about 751.3397481563.

The spelling of 424139866 in words is "four hundred twenty-four million, one hundred thirty-nine thousand, eight hundred sixty-six".