138805464 has 64 divisors (see below), whose sum is σ = 398361600. Its totient is φ = 39481344.

The previous prime is 138805451. The next prime is 138805481. The reversal of 138805464 is 464508831.

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, 38424 + ... + 41880.

It is an arithmetic number, because the mean of its divisors is an integer number (6224400).

Almost surely, 2^138805464 is an apocalyptic number.

138805464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138805464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199180800).

138805464 is an abundant number, since it is smaller than the sum of its proper divisors (259556136).

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

138805464 is a wasteful number, since it uses less digits than its factorization.

138805464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712 (or 3708 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 138805464 is about 11781.5730698409. The cubic root of 138805464 is about 517.7683753477.

The spelling of 138805464 in words is "one hundred thirty-eight million, eight hundred five thousand, four hundred sixty-four".