861525408 has 24 divisors (see below), whose sum is σ = 2261504448. Its totient is φ = 287175104.

The previous prime is 861525407. The next prime is 861525409. The reversal of 861525408 is 804525168.

861525408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (861525407) and next prime (861525409).

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (861525407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4487016 + ... + 4487207.

It is an arithmetic number, because the mean of its divisors is an integer number (94229352).

Almost surely, 2^861525408 is an apocalyptic number.

It is an amenable number.

861525408 is an abundant number, since it is smaller than the sum of its proper divisors (1399979040).

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

861525408 is a wasteful number, since it uses less digits than its factorization.

861525408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8974236 (or 8974228 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 39.

The square root of 861525408 is about 29351.7530651919. The cubic root of 861525408 is about 951.5304630881.

The spelling of 861525408 in words is "eight hundred sixty-one million, five hundred twenty-five thousand, four hundred eight".