139197240 has 288 divisors, whose sum is σ = 567665280. Its totient is φ = 29320704.

The previous prime is 139197193. The next prime is 139197271. The reversal of 139197240 is 42791931.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 139197195 and 139197204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 229017 + ... + 229623.

It is an arithmetic number, because the mean of its divisors is an integer number (1971060).

Almost surely, 2^139197240 is an apocalyptic number.

139197240 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 139197240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283832640).

139197240 is an abundant number, since it is smaller than the sum of its proper divisors (428468040).

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

139197240 is a wasteful number, since it uses less digits than its factorization.

139197240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 139197240 is about 11798.1879964679. The cubic root of 139197240 is about 518.2550484938.

The spelling of 139197240 in words is "one hundred thirty-nine million, one hundred ninety-seven thousand, two hundred forty".