138620298 has 16 divisors (see below), whose sum is σ = 278774496. Its totient is φ = 45951120.

The previous prime is 138620297. The next prime is 138620353. The reversal of 138620298 is 892026831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138620291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62736 + ... + 64907.

It is an arithmetic number, because the mean of its divisors is an integer number (17423406).

Almost surely, 2^138620298 is an apocalyptic number.

138620298 is an abundant number, since it is smaller than the sum of its proper divisors (140154198).

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

138620298 is a wasteful number, since it uses less digits than its factorization.

138620298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127829.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 138620298 is about 11773.7121588733. The cubic root of 138620298 is about 517.5380391651.

The spelling of 138620298 in words is "one hundred thirty-eight million, six hundred twenty thousand, two hundred ninety-eight".