139223280 has 160 divisors (see below), whose sum is σ = 499968000. Its totient is φ = 31389696.

The previous prime is 139223257. The next prime is 139223281. The reversal of 139223280 is 82322931.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139223281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132196 + ... + 133244.

It is an arithmetic number, because the mean of its divisors is an integer number (3124800).

Almost surely, 2^139223280 is an apocalyptic number.

139223280 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 139223280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249984000).

139223280 is an abundant number, since it is smaller than the sum of its proper divisors (360744720).

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

139223280 is a wasteful number, since it uses less digits than its factorization.

139223280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 139223280 is about 11799.2915041540. The cubic root of 139223280 is about 518.2873635981.

The spelling of 139223280 in words is "one hundred thirty-nine million, two hundred twenty-three thousand, two hundred eighty".