861604024 has 8 divisors (see below), whose sum is σ = 1615507560. Its totient is φ = 430802008.

The previous prime is 861604021. The next prime is 861604067. The reversal of 861604024 is 420406168.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×861604024² = 1484722988345985152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861604021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53850244 + ... + 53850259.

It is an arithmetic number, because the mean of its divisors is an integer number (201938445).

Almost surely, 2^861604024 is an apocalyptic number.

It is an amenable number.

861604024 is a deficient number, since it is larger than the sum of its proper divisors (753903536).

861604024 is a wasteful number, since it uses less digits than its factorization.

861604024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107700509 (or 107700505 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 861604024 is about 29353.0922391492. The cubic root of 861604024 is about 951.5594052578.

The spelling of 861604024 in words is "eight hundred sixty-one million, six hundred four thousand, twenty-four".