139987236 has 12 divisors (see below), whose sum is σ = 326636912. Its totient is φ = 46662408.

The previous prime is 139987229. The next prime is 139987247. The reversal of 139987236 is 632789931.

It is a tau number, because it is divible by the number of its divisors (12).

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, 5832790 + ... + 5832813.

Almost surely, 2^139987236 is an apocalyptic number.

It is an amenable number.

139987236 is an abundant number, since it is smaller than the sum of its proper divisors (186649676).

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

139987236 is a wasteful number, since it uses less digits than its factorization.

139987236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11665610 (or 11665608 counting only the distinct ones).

The product of its digits is 489888, while the sum is 48.

The square root of 139987236 is about 11831.6201764594. The cubic root of 139987236 is about 519.2336294687.

The spelling of 139987236 in words is "one hundred thirty-nine million, nine hundred eighty-seven thousand, two hundred thirty-six".