861389412 has 48 divisors (see below), whose sum is σ = 2185572480. Its totient is φ = 262464768.

The previous prime is 861389411. The next prime is 861389423. The reversal of 861389412 is 214983168.

861389412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (861389411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10737 + ... + 42872.

It is an arithmetic number, because the mean of its divisors is an integer number (45532760).

Almost surely, 2^861389412 is an apocalyptic number.

It is an amenable number.

861389412 is an abundant number, since it is smaller than the sum of its proper divisors (1324183068).

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

861389412 is a wasteful number, since it uses less digits than its factorization.

861389412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53732 (or 53730 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 861389412 is about 29349.4363148596. The cubic root of 861389412 is about 951.4803925406.

The spelling of 861389412 in words is "eight hundred sixty-one million, three hundred eighty-nine thousand, four hundred twelve".