139344240 has 360 divisors, whose sum is σ = 546808752. Its totient is φ = 29245440.

The previous prime is 139344239. The next prime is 139344259. The reversal of 139344240 is 42443931.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 139344198 and 139344207.

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, 3398620 + ... + 3398660.

Almost surely, 2^139344240 is an apocalyptic number.

139344240 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 139344240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273404376).

139344240 is an abundant number, since it is smaller than the sum of its proper divisors (407464512).

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

139344240 is a wasteful number, since it uses less digits than its factorization.

139344240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 139344240 is about 11804.4161227907. The cubic root of 139344240 is about 518.4374196621.

The spelling of 139344240 in words is "one hundred thirty-nine million, three hundred forty-four thousand, two hundred forty".