840606742 has 8 divisors (see below), whose sum is σ = 1290233736. Its totient is φ = 410528832.

The previous prime is 840606719. The next prime is 840606743. The reversal of 840606742 is 247606048.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840606743) 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, 4887163 + ... + 4887334.

It is an arithmetic number, because the mean of its divisors is an integer number (161279217).

Almost surely, 2^840606742 is an apocalyptic number.

840606742 is a deficient number, since it is larger than the sum of its proper divisors (449626994).

840606742 is a wasteful number, since it uses less digits than its factorization.

840606742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9774542.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 840606742 is about 28993.2188968386. The cubic root of 840606742 is about 943.7659178228.

The spelling of 840606742 in words is "eight hundred forty million, six hundred six thousand, seven hundred forty-two".