1549389132 has 18 divisors (see below), whose sum is σ = 3916511508. Its totient is φ = 516463032.

The previous prime is 1549389131. The next prime is 1549389161. The reversal of 1549389132 is 2319839451.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (1549389131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21519258 + ... + 21519329.

Almost surely, 2^1549389132 is an apocalyptic number.

1549389132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1549389132 is an abundant number, since it is smaller than the sum of its proper divisors (2367122376).

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

1549389132 is a wasteful number, since it uses less digits than its factorization.

1549389132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43038597 (or 43038592 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 1549389132 is about 39362.2805741741. The cubic root of 1549389132 is about 1157.1424741262.

The spelling of 1549389132 in words is "one billion, five hundred forty-nine million, three hundred eighty-nine thousand, one hundred thirty-two".