138506346 has 24 divisors (see below), whose sum is σ = 327379104. Its totient is φ = 41971560.

The previous prime is 138506341. The next prime is 138506363. The reversal of 138506346 is 643605831.

138506346 is a `hidden beast` number, since 13 + 8 + 5 + 0 + 634 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 138506346.

It is not an unprimeable number, because it can be changed into a prime (138506341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349566 + ... + 349961.

It is an arithmetic number, because the mean of its divisors is an integer number (13640796).

Almost surely, 2^138506346 is an apocalyptic number.

138506346 is an abundant number, since it is smaller than the sum of its proper divisors (188872758).

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

138506346 is a wasteful number, since it uses less digits than its factorization.

138506346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699546 (or 699543 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 138506346 is about 11768.8719085561. The cubic root of 138506346 is about 517.3961872556.

The spelling of 138506346 in words is "one hundred thirty-eight million, five hundred six thousand, three hundred forty-six".