840645046 has 4 divisors (see below), whose sum is σ = 1260967572. Its totient is φ = 420322522.

The previous prime is 840645023. The next prime is 840645049. The reversal of 840645046 is 640546048.

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

It is a junction number, because it is equal to n+sod(n) for n = 840644996 and 840645014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840645049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210161260 + ... + 210161263.

It is an arithmetic number, because the mean of its divisors is an integer number (315241893).

Almost surely, 2^840645046 is an apocalyptic number.

840645046 is a deficient number, since it is larger than the sum of its proper divisors (420322526).

840645046 is a wasteful number, since it uses less digits than its factorization.

840645046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420322525.

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 840645046 is about 28993.8794575683. The cubic root of 840645046 is about 943.7802524928.

The spelling of 840645046 in words is "eight hundred forty million, six hundred forty-five thousand, forty-six".