1538617632 has 48 divisors (see below), whose sum is σ = 4045148352. Its totient is φ = 512075520.

The previous prime is 1538617631. The next prime is 1538617687. The reversal of 1538617632 is 2367168351.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (1538617631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51333 + ... + 75579.

It is an arithmetic number, because the mean of its divisors is an integer number (84273924).

Almost surely, 2^1538617632 is an apocalyptic number.

1538617632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1538617632 is an abundant number, since it is smaller than the sum of its proper divisors (2506530720).

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

1538617632 is a wasteful number, since it uses less digits than its factorization.

1538617632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24921 (or 24913 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 1538617632 is about 39225.2167871638. The cubic root of 1538617632 is about 1154.4547145899.

The spelling of 1538617632 in words is "one billion, five hundred thirty-eight million, six hundred seventeen thousand, six hundred thirty-two".