840572086 has 4 divisors (see below), whose sum is σ = 1260858132. Its totient is φ = 420286042.

The previous prime is 840572077. The next prime is 840572113. The reversal of 840572086 is 680275048.

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

It is a super-2 number, since 2×840572086² = 1413122863524782792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210143020 + ... + 210143023.

It is an arithmetic number, because the mean of its divisors is an integer number (315214533).

Almost surely, 2^840572086 is an apocalyptic number.

840572086 is a deficient number, since it is larger than the sum of its proper divisors (420286046).

840572086 is a wasteful number, since it uses less digits than its factorization.

840572086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420286045.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 840572086 is about 28992.6212336863. The cubic root of 840572086 is about 943.7529479843.

The spelling of 840572086 in words is "eight hundred forty million, five hundred seventy-two thousand, eighty-six".