138420298 has 8 divisors (see below), whose sum is σ = 209686500. Its totient is φ = 68524800.

The previous prime is 138420283. The next prime is 138420323. The reversal of 138420298 is 892024831.

It can be written as a sum of positive squares in 2 ways, for example, as 93837969 + 44582329 = 9687^2 + 6677^2 .

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, 342423 + ... + 342826.

Almost surely, 2^138420298 is an apocalyptic number.

138420298 is a deficient number, since it is larger than the sum of its proper divisors (71266202).

138420298 is a wasteful number, since it uses less digits than its factorization.

138420298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685352.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 138420298 is about 11765.2155951347. The cubic root of 138420298 is about 517.2890197714.

The spelling of 138420298 in words is "one hundred thirty-eight million, four hundred twenty thousand, two hundred ninety-eight".