139420000 has 60 divisors (see below), whose sum is σ = 343043316. Its totient is φ = 55760000.

The previous prime is 139419971. The next prime is 139420003. The reversal of 139420000 is 24931.

It is a self number, because there is not a number n which added to its sum of digits gives 139420000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139420003) 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 9 ways as a sum of consecutive naturals, for example, 16515 + ... + 23485.

Almost surely, 2^139420000 is an apocalyptic number.

139420000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139420000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171521658).

139420000 is an abundant number, since it is smaller than the sum of its proper divisors (203623316).

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

139420000 is an frugal number, since it uses more digits than its factorization.

139420000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001 (or 6978 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 139420000 is about 11807.6246552810. The cubic root of 139420000 is about 518.5313589665.

Adding to 139420000 its reverse (24931), we get a palindrome (139444931).

The spelling of 139420000 in words is "one hundred thirty-nine million, four hundred twenty thousand".