867441780 has 144 divisors (see below), whose sum is σ = 2762532864. Its totient is φ = 219901440.

The previous prime is 867441761. The next prime is 867441791. The reversal of 867441780 is 87144768.

867441780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×867441780³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 790192 + ... + 791288.

It is an arithmetic number, because the mean of its divisors is an integer number (19184256).

Almost surely, 2^867441780 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 867441780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1381266432).

867441780 is an abundant number, since it is smaller than the sum of its proper divisors (1895091084).

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

867441780 is a wasteful number, since it uses less digits than its factorization.

867441780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326 (or 1321 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 867441780 is about 29452.3645909798. The cubic root of 867441780 is about 953.7036512114.

The spelling of 867441780 in words is "eight hundred sixty-seven million, four hundred forty-one thousand, seven hundred eighty".