138436654 has 16 divisors (see below), whose sum is σ = 211101408. Its totient is φ = 68078592.

The previous prime is 138436643. The next prime is 138436657. The reversal of 138436654 is 456634831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138436657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30262 + ... + 34534.

It is an arithmetic number, because the mean of its divisors is an integer number (13193838).

Almost surely, 2^138436654 is an apocalyptic number.

138436654 is a deficient number, since it is larger than the sum of its proper divisors (72664754).

138436654 is a wasteful number, since it uses less digits than its factorization.

138436654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539.

The product of its digits is 207360, while the sum is 40.

The square root of 138436654 is about 11765.9106744867. The cubic root of 138436654 is about 517.3093935801.

The spelling of 138436654 in words is "one hundred thirty-eight million, four hundred thirty-six thousand, six hundred fifty-four".