139253760 has 144 divisors (see below), whose sum is σ = 482947920. Its totient is φ = 37109760.

The previous prime is 139253743. The next prime is 139253771. The reversal of 139253760 is 67352931.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91405 + ... + 92915.

It is an arithmetic number, because the mean of its divisors is an integer number (3353805).

Almost surely, 2^139253760 is an apocalyptic number.

139253760 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 139253760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241473960).

139253760 is an abundant number, since it is smaller than the sum of its proper divisors (343694160).

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

139253760 is a wasteful number, since it uses less digits than its factorization.

139253760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 1521 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 139253760 is about 11800.5830364436. The cubic root of 139253760 is about 518.3251835330.

The spelling of 139253760 in words is "one hundred thirty-nine million, two hundred fifty-three thousand, seven hundred sixty".