138490086 has 16 divisors (see below), whose sum is σ = 316548864. Its totient is φ = 39568584.

The previous prime is 138490073. The next prime is 138490097. The reversal of 138490086 is 680094831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1648650 + ... + 1648733.

It is an arithmetic number, because the mean of its divisors is an integer number (19784304).

Almost surely, 2^138490086 is an apocalyptic number.

138490086 is an abundant number, since it is smaller than the sum of its proper divisors (178058778).

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

138490086 is a wasteful number, since it uses less digits than its factorization.

138490086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297395.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 138490086 is about 11768.1810829032. The cubic root of 138490086 is about 517.3759398290.

The spelling of 138490086 in words is "one hundred thirty-eight million, four hundred ninety thousand, eighty-six".