840428814 has 8 divisors (see below), whose sum is σ = 1680857640. Its totient is φ = 280142936.

The previous prime is 840428789. The next prime is 840428819. The reversal of 840428814 is 418824048.

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

840428814 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840428819) 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, 70035729 + ... + 70035740.

It is an arithmetic number, because the mean of its divisors is an integer number (210107205).

Almost surely, 2^840428814 is an apocalyptic number.

840428814 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

840428814 is a wasteful number, since it uses less digits than its factorization.

840428814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140071474.

The product of its (nonzero) digits is 65536, while the sum is 39.

The square root of 840428814 is about 28990.1502928150. The cubic root of 840428814 is about 943.6993253553.

The spelling of 840428814 in words is "eight hundred forty million, four hundred twenty-eight thousand, eight hundred fourteen".