866453538 has 8 divisors (see below), whose sum is σ = 1732907088. Its totient is φ = 288817844.

The previous prime is 866453521. The next prime is 866453551. The reversal of 866453538 is 835354668.

It is a sphenic number, since it is the product of 3 distinct primes.

866453538 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72204456 + ... + 72204467.

It is an arithmetic number, because the mean of its divisors is an integer number (216613386).

Almost surely, 2^866453538 is an apocalyptic number.

866453538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

866453538 is a wasteful number, since it uses less digits than its factorization.

866453538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144408928.

The product of its digits is 2073600, while the sum is 48.

The square root of 866453538 is about 29435.5828547695. The cubic root of 866453538 is about 953.3413413458.

The spelling of 866453538 in words is "eight hundred sixty-six million, four hundred fifty-three thousand, five hundred thirty-eight".