139820000 has 60 divisors (see below), whose sum is σ = 344027376. Its totient is φ = 55920000.

The previous prime is 139819957. The next prime is 139820017. The reversal of 139820000 is 28931.

139820000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16505 + ... + 23495.

Almost surely, 2^139820000 is an apocalyptic number.

139820000 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 139820000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172013688).

139820000 is an abundant number, since it is smaller than the sum of its proper divisors (204207376).

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

139820000 is an frugal number, since it uses more digits than its factorization.

139820000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7021 (or 6998 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 139820000 is about 11824.5507314232. The cubic root of 139820000 is about 519.0267792831.

Adding to 139820000 its reverse (28931), we get a palindrome (139848931).

The spelling of 139820000 in words is "one hundred thirty-nine million, eight hundred twenty thousand".