840872744 has 16 divisors (see below), whose sum is σ = 1583236800. Its totient is φ = 418676272.

The previous prime is 840872743. The next prime is 840872771. The reversal of 840872744 is 447278048.

It is a junction number, because it is equal to n+sod(n) for n = 840872695 and 840872704.

It is not an unprimeable number, because it can be changed into a prime (840872743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217982 + ... + 221805.

It is an arithmetic number, because the mean of its divisors is an integer number (98952300).

Almost surely, 2^840872744 is an apocalyptic number.

It is an amenable number.

840872744 is a deficient number, since it is larger than the sum of its proper divisors (742364056).

840872744 is a wasteful number, since it uses less digits than its factorization.

840872744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440032 (or 440028 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 44.

The square root of 840872744 is about 28997.8058480293. The cubic root of 840872744 is about 943.8654559039.

The spelling of 840872744 in words is "eight hundred forty million, eight hundred seventy-two thousand, seven hundred forty-four".