139142280 has 64 divisors (see below), whose sum is σ = 441987840. Its totient is φ = 34921472.

The previous prime is 139142273. The next prime is 139142293. The reversal of 139142280 is 82241931.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32064 + ... + 36143.

It is an arithmetic number, because the mean of its divisors is an integer number (6906060).

Almost surely, 2^139142280 is an apocalyptic number.

139142280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139142280 is an abundant number, since it is smaller than the sum of its proper divisors (302845560).

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

139142280 is a wasteful number, since it uses less digits than its factorization.

139142280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68238 (or 68234 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 139142280 is about 11795.8585952867. The cubic root of 139142280 is about 518.1868310324.

The spelling of 139142280 in words is "one hundred thirty-nine million, one hundred forty-two thousand, two hundred eighty".