139228250 has 32 divisors (see below), whose sum is σ = 297872640. Its totient is φ = 47734800.

The previous prime is 139228237. The next prime is 139228273. The reversal of 139228250 is 52822931.

It is a happy number.

It is a Curzon number.

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, 38030 + ... + 41529.

It is an arithmetic number, because the mean of its divisors is an integer number (9308520).

Almost surely, 2^139228250 is an apocalyptic number.

139228250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139228250 is an abundant number, since it is smaller than the sum of its proper divisors (158644390).

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

139228250 is an equidigital number, since it uses as much as digits as its factorization.

139228250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79583 (or 79573 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 139228250 is about 11799.5021081400. The cubic root of 139228250 is about 518.2935308080.

It can be divided in two parts, 1392282 and 50, that multiplied together give a triangular number (69614100 = T₁₁₇₉₉).

The spelling of 139228250 in words is "one hundred thirty-nine million, two hundred twenty-eight thousand, two hundred fifty".