861387448 has 16 divisors (see below), whose sum is σ = 1626723000. Its totient is φ = 427594656.

The previous prime is 861387427. The next prime is 861387463. The reversal of 861387448 is 844783168.

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 3 ways as a sum of consecutive naturals, for example, 386203 + ... + 388426.

Almost surely, 2^861387448 is an apocalyptic number.

It is an amenable number.

861387448 is a deficient number, since it is larger than the sum of its proper divisors (765335552).

861387448 is a wasteful number, since it uses less digits than its factorization.

861387448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774774 (or 774770 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 861387448 is about 29349.4028559356. The cubic root of 861387448 is about 951.4796694031.

The spelling of 861387448 in words is "eight hundred sixty-one million, three hundred eighty-seven thousand, four hundred forty-eight".