139243260 has 96 divisors (see below), whose sum is σ = 444612672. Its totient is φ = 32256000.

The previous prime is 139243253. The next prime is 139243271. The reversal of 139243260 is 62342931.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8010 + ... + 18510.

It is an arithmetic number, because the mean of its divisors is an integer number (4631382).

Almost surely, 2^139243260 is an apocalyptic number.

139243260 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 139243260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222306336).

139243260 is an abundant number, since it is smaller than the sum of its proper divisors (305369412).

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

139243260 is a wasteful number, since it uses less digits than its factorization.

139243260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10543 (or 10541 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 139243260 is about 11800.1381347847. The cubic root of 139243260 is about 518.3121556353.

The spelling of 139243260 in words is "one hundred thirty-nine million, two hundred forty-three thousand, two hundred sixty".