840084542 has 8 divisors (see below), whose sum is σ = 1374683832. Its totient is φ = 381856600.

The previous prime is 840084541. The next prime is 840084587. The reversal of 840084542 is 245480048.

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 (840084541) 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, 19092809 + ... + 19092852.

It is an arithmetic number, because the mean of its divisors is an integer number (171835479).

Almost surely, 2^840084542 is an apocalyptic number.

840084542 is a deficient number, since it is larger than the sum of its proper divisors (534599290).

840084542 is a wasteful number, since it uses less digits than its factorization.

840084542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38185674.

The product of its (nonzero) digits is 40960, while the sum is 35.

The square root of 840084542 is about 28984.2119437462. The cubic root of 840084542 is about 943.5704492303.

The spelling of 840084542 in words is "eight hundred forty million, eighty-four thousand, five hundred forty-two".