139338690 has 16 divisors (see below), whose sum is σ = 334412928. Its totient is φ = 37156976.

The previous prime is 139338679. The next prime is 139338697. The reversal of 139338690 is 96833931.

It is a super-2 number, since 2×139338690² = 38830541061832200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139338697) 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, 2322282 + ... + 2322341.

It is an arithmetic number, because the mean of its divisors is an integer number (20900808).

Almost surely, 2^139338690 is an apocalyptic number.

139338690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139338690 is an abundant number, since it is smaller than the sum of its proper divisors (195074238).

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

139338690 is a wasteful number, since it uses less digits than its factorization.

139338690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644633.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 139338690 is about 11804.1810389370. The cubic root of 139338690 is about 518.4305365504.

The spelling of 139338690 in words is "one hundred thirty-nine million, three hundred thirty-eight thousand, six hundred ninety".