138478562 has 8 divisors (see below), whose sum is σ = 209556396. Its totient is φ = 68626432.

The previous prime is 138478541. The next prime is 138478573. The reversal of 138478562 is 265874831.

It can be written as a sum of positive squares in 2 ways, for example, as 79049881 + 59428681 = 8891^2 + 7709^2 .

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

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, 306143 + ... + 306594.

Almost surely, 2^138478562 is an apocalyptic number.

138478562 is a deficient number, since it is larger than the sum of its proper divisors (71077834).

138478562 is a wasteful number, since it uses less digits than its factorization.

138478562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612852.

The product of its digits is 322560, while the sum is 44.

The square root of 138478562 is about 11767.6914473485. The cubic root of 138478562 is about 517.3615888482.

The spelling of 138478562 in words is "one hundred thirty-eight million, four hundred seventy-eight thousand, five hundred sixty-two".