138402085 has 16 divisors (see below), whose sum is σ = 169174656. Its totient is φ = 108678208.

The previous prime is 138402071. The next prime is 138402097. The reversal of 138402085 is 580204831.

It is not a de Polignac number, because 138402085 - 2⁷ = 138401957 is a prime.

It is a super-3 number, since 3×138402085³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68307 + ... + 70303.

It is an arithmetic number, because the mean of its divisors is an integer number (10573416).

Almost surely, 2^138402085 is an apocalyptic number.

It is an amenable number.

138402085 is a deficient number, since it is larger than the sum of its proper divisors (30772571).

138402085 is a wasteful number, since it uses less digits than its factorization.

138402085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 138402085 is about 11764.4415507069. The cubic root of 138402085 is about 517.2663309069.

The spelling of 138402085 in words is "one hundred thirty-eight million, four hundred two thousand, eighty-five".