139953240 has 384 divisors, whose sum is σ = 569088000. Its totient is φ = 29113344.

The previous prime is 139953223. The next prime is 139953257. The reversal of 139953240 is 42359931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (139953223) and next prime (139953257).

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 = 139953195 and 139953204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1771521 + ... + 1771599.

It is an arithmetic number, because the mean of its divisors is an integer number (1482000).

Almost surely, 2^139953240 is an apocalyptic number.

139953240 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 139953240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284544000).

139953240 is an abundant number, since it is smaller than the sum of its proper divisors (429134760).

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

139953240 is a wasteful number, since it uses less digits than its factorization.

139953240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 139953240 is about 11830.1834305306. The cubic root of 139953240 is about 519.1915939801.

The spelling of 139953240 in words is "one hundred thirty-nine million, nine hundred fifty-three thousand, two hundred forty".