1538446866 has 32 divisors (see below), whose sum is σ = 3361333248. Its totient is φ = 465540240.

The previous prime is 1538446849. The next prime is 1538446883. The reversal of 1538446866 is 6686448351.

It is an interprime number because it is at equal distance from previous prime (1538446849) and next prime (1538446883).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31951 + ... + 64013.

It is an arithmetic number, because the mean of its divisors is an integer number (105041664).

Almost surely, 2^1538446866 is an apocalyptic number.

1538446866 is an abundant number, since it is smaller than the sum of its proper divisors (1822886382).

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

1538446866 is a wasteful number, since it uses less digits than its factorization.

1538446866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32806.

The product of its digits is 3317760, while the sum is 51.

The square root of 1538446866 is about 39223.0399892716. The cubic root of 1538446866 is about 1154.4120033267.

The spelling of 1538446866 in words is "one billion, five hundred thirty-eight million, four hundred forty-six thousand, eight hundred sixty-six".