138604562 has 8 divisors (see below), whose sum is σ = 208465356. Its totient is φ = 69116112.

The previous prime is 138604549. The next prime is 138604573. The reversal of 138604562 is 265406831.

138604562 = 414² + 415² + ... + 786².

It can be written as a sum of positive squares in 2 ways, for example, as 117527281 + 21077281 = 10841^2 + 4591^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×138604562² = 38422449214423688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92153 + ... + 93644.

Almost surely, 2^138604562 is an apocalyptic number.

138604562 is a deficient number, since it is larger than the sum of its proper divisors (69860794).

138604562 is a wasteful number, since it uses less digits than its factorization.

138604562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186172.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 138604562 is about 11773.0438714888. The cubic root of 138604562 is about 517.5184550040.

The spelling of 138604562 in words is "one hundred thirty-eight million, six hundred four thousand, five hundred sixty-two".