867381780 has 48 divisors (see below), whose sum is σ = 2429953344. Its totient is φ = 231179520.

The previous prime is 867381763. The next prime is 867381791. The reversal of 867381780 is 87183768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203875 + ... + 208085.

It is an arithmetic number, because the mean of its divisors is an integer number (50624028).

Almost surely, 2^867381780 is an apocalyptic number.

It is an amenable number.

867381780 is an abundant number, since it is smaller than the sum of its proper divisors (1562571564).

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

867381780 is a wasteful number, since it uses less digits than its factorization.

867381780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7656 (or 7654 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The square root of 867381780 is about 29451.3459794285. The cubic root of 867381780 is about 953.6816618246.

The spelling of 867381780 in words is "eight hundred sixty-seven million, three hundred eighty-one thousand, seven hundred eighty".