878041440 has 72 divisors (see below), whose sum is σ = 2996321328. Its totient is φ = 234144000.

The previous prime is 878041397. The next prime is 878041441. The reversal of 878041440 is 44140878.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 878041395 and 878041404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878041441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 303436 + ... + 306315.

It is an arithmetic number, because the mean of its divisors is an integer number (41615574).

Almost surely, 2^878041440 is an apocalyptic number.

878041440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

878041440 is an abundant number, since it is smaller than the sum of its proper divisors (2118279888).

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

878041440 is a wasteful number, since it uses less digits than its factorization.

878041440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609772 (or 609761 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 878041440 is about 29631.7640379374. The cubic root of 878041440 is about 957.5725127840.

The spelling of 878041440 in words is "eight hundred seventy-eight million, forty-one thousand, four hundred forty".