138804092 has 48 divisors (see below), whose sum is σ = 288960000. Its totient is φ = 57081024.

The previous prime is 138804091. The next prime is 138804109. The reversal of 138804092 is 290408831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138804091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161159 + ... + 162017.

It is an arithmetic number, because the mean of its divisors is an integer number (6020000).

Almost surely, 2^138804092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138804092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144480000).

138804092 is an abundant number, since it is smaller than the sum of its proper divisors (150155908).

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

138804092 is a wasteful number, since it uses less digits than its factorization.

138804092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 138804092 is about 11781.5148431770. The cubic root of 138804092 is about 517.7666694097.

The spelling of 138804092 in words is "one hundred thirty-eight million, eight hundred four thousand, ninety-two".