856424434 has 8 divisors (see below), whose sum is σ = 1287537840. Its totient is φ = 427245156.

The previous prime is 856424423. The next prime is 856424447. The reversal of 856424434 is 434424658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×856424434² = 1466925622304440712, which contains 22 as substring.

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, 482424 + ... + 484195.

It is an arithmetic number, because the mean of its divisors is an integer number (160942230).

Almost surely, 2^856424434 is an apocalyptic number.

856424434 is a deficient number, since it is larger than the sum of its proper divisors (431113406).

856424434 is a wasteful number, since it uses less digits than its factorization.

856424434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967064.

The product of its digits is 368640, while the sum is 40.

The square root of 856424434 is about 29264.7302054880. The cubic root of 856424434 is about 949.6487839291.

The spelling of 856424434 in words is "eight hundred fifty-six million, four hundred twenty-four thousand, four hundred thirty-four".