840652646 has 4 divisors (see below), whose sum is σ = 1260978972. Its totient is φ = 420326322.

The previous prime is 840652633. The next prime is 840652711. The reversal of 840652646 is 646256048.

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

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, 210163160 + ... + 210163163.

It is an arithmetic number, because the mean of its divisors is an integer number (315244743).

Almost surely, 2^840652646 is an apocalyptic number.

840652646 is a deficient number, since it is larger than the sum of its proper divisors (420326326).

840652646 is a wasteful number, since it uses less digits than its factorization.

840652646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420326325.

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 840652646 is about 28994.0105194159. The cubic root of 840652646 is about 943.7830966216.

The spelling of 840652646 in words is "eight hundred forty million, six hundred fifty-two thousand, six hundred forty-six".