1387009632 has 24 divisors (see below), whose sum is σ = 3640900536. Its totient is φ = 462336512.

The previous prime is 1387009609. The next prime is 1387009667. The reversal of 1387009632 is 2369007831.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7223913 + ... + 7224104.

It is an arithmetic number, because the mean of its divisors is an integer number (151704189).

Almost surely, 2^1387009632 is an apocalyptic number.

1387009632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1387009632 is an abundant number, since it is smaller than the sum of its proper divisors (2253890904).

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

1387009632 is a wasteful number, since it uses less digits than its factorization.

1387009632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14448030 (or 14448022 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 1387009632 is about 37242.5782136522. The cubic root of 1387009632 is about 1115.2181417456.

The spelling of 1387009632 in words is "one billion, three hundred eighty-seven million, nine thousand, six hundred thirty-two".