840078030 has 32 divisors (see below), whose sum is σ = 2199477888. Its totient is φ = 203655200.

The previous prime is 840078017. The next prime is 840078067. The reversal of 840078030 is 30870048.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1272516 + ... + 1273175.

It is an arithmetic number, because the mean of its divisors is an integer number (68733684).

Almost surely, 2^840078030 is an apocalyptic number.

840078030 is an abundant number, since it is smaller than the sum of its proper divisors (1359399858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

840078030 is a wasteful number, since it uses less digits than its factorization.

840078030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545712.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 840078030 is about 28984.0996065084. The cubic root of 840078030 is about 943.5680111636.

The spelling of 840078030 in words is "eight hundred forty million, seventy-eight thousand, thirty".