139828986 has 24 divisors (see below), whose sum is σ = 330505344. Its totient is φ = 42372360.

The previous prime is 139828979. The next prime is 139829023. The reversal of 139828986 is 689828931.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 352906 + ... + 353301.

It is an arithmetic number, because the mean of its divisors is an integer number (13771056).

Almost surely, 2^139828986 is an apocalyptic number.

139828986 is an abundant number, since it is smaller than the sum of its proper divisors (190676358).

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

139828986 is a wasteful number, since it uses less digits than its factorization.

139828986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706226 (or 706223 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 139828986 is about 11824.9306974713. The cubic root of 139828986 is about 519.0378980423.

Subtracting 139828986 from its reverse (689828931), we obtain a palindrome (549999945).

The spelling of 139828986 in words is "one hundred thirty-nine million, eight hundred twenty-eight thousand, nine hundred eighty-six".