1878870 has 64 divisors (see below), whose sum is σ = 5391360. Its totient is φ = 409728.

The previous prime is 1878869. The next prime is 1878883. The reversal of 1878870 is 788781.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4636 + ... + 5024.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2^1878870 is an apocalyptic number.

1878870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1878870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2695680).

1878870 is an abundant number, since it is smaller than the sum of its proper divisors (3512490).

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

1878870 is a wasteful number, since it uses less digits than its factorization.

1878870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429.

The product of its (nonzero) digits is 25088, while the sum is 39.

The square root of 1878870 is about 1370.7187895407. The cubic root of 1878870 is about 123.3953831104.

The spelling of 1878870 in words is "one million, eight hundred seventy-eight thousand, eight hundred seventy".