1878825720 has 128 divisors (see below), whose sum is σ = 5983165440. Its totient is φ = 470353920.

The previous prime is 1878825719. The next prime is 1878825727. The reversal of 1878825720 is 275288781.

It is a super-2 number, since 2×1878825720² = 7059972172267036800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1878825720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1878825727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1025205 + ... + 1027035.

It is an arithmetic number, because the mean of its divisors is an integer number (46743480).

Almost surely, 2^1878825720 is an apocalyptic number.

1878825720 is a gapful number since it is divisible by the number (10) 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 1878825720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2991582720).

1878825720 is an abundant number, since it is smaller than the sum of its proper divisors (4104339720).

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

1878825720 is a wasteful number, since it uses less digits than its factorization.

1878825720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365 (or 2361 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 48.

The square root of 1878825720 is about 43345.4232878167. The cubic root of 1878825720 is about 1233.9441373509.

The spelling of 1878825720 in words is "one billion, eight hundred seventy-eight million, eight hundred twenty-five thousand, seven hundred twenty".