861012824 has 16 divisors (see below), whose sum is σ = 1845027600. Its totient is φ = 369005472.

The previous prime is 861012809. The next prime is 861012839. The reversal of 861012824 is 428210168.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (861012809) and next prime (861012839).

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, 7687559 + ... + 7687670.

It is an arithmetic number, because the mean of its divisors is an integer number (115314225).

Almost surely, 2^861012824 is an apocalyptic number.

It is an amenable number.

861012824 is an abundant number, since it is smaller than the sum of its proper divisors (984014776).

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

861012824 is a wasteful number, since it uses less digits than its factorization.

861012824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15375242 (or 15375238 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 861012824 is about 29343.0200218042. The cubic root of 861012824 is about 951.3417141362.

The spelling of 861012824 in words is "eight hundred sixty-one million, twelve thousand, eight hundred twenty-four".