840077880 has 64 divisors (see below), whose sum is σ = 2528940960. Its totient is φ = 223246848.

The previous prime is 840077873. The next prime is 840077891. The reversal of 840077880 is 88770048.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23214 + ... + 47106.

Almost surely, 2^840077880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840077880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1264470480).

840077880 is an abundant number, since it is smaller than the sum of its proper divisors (1688863080).

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

840077880 is a wasteful number, since it uses less digits than its factorization.

840077880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24200 (or 24196 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 840077880 is about 28984.0970188826. The cubic root of 840077880 is about 943.5679550040.

The spelling of 840077880 in words is "eight hundred forty million, seventy-seven thousand, eight hundred eighty".