878739840 has 640 divisors, whose sum is σ = 3625585920. Its totient is φ = 200724480.

The previous prime is 878739821. The next prime is 878739853. The reversal of 878739840 is 48937878.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 13115487 + ... + 13115553.

It is an arithmetic number, because the mean of its divisors is an integer number (5664978).

Almost surely, 2^878739840 is an apocalyptic number.

878739840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 878739840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1812792960).

878739840 is an abundant number, since it is smaller than the sum of its proper divisors (2746846080).

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

878739840 is a wasteful number, since it uses less digits than its factorization.

878739840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The square root of 878739840 is about 29643.5463465490. The cubic root of 878739840 is about 957.8263320141.

The spelling of 878739840 in words is "eight hundred seventy-eight million, seven hundred thirty-nine thousand, eight hundred forty".