139038720 has 208 divisors, whose sum is σ = 465510912. Its totient is φ = 35389440.

The previous prime is 139038709. The next prime is 139038727. The reversal of 139038720 is 27830931.

It is not an unprimeable number, because it can be changed into a prime (139038727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1904604 + ... + 1904676.

Almost surely, 2^139038720 is an apocalyptic number.

139038720 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 139038720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232755456).

139038720 is an abundant number, since it is smaller than the sum of its proper divisors (326472192).

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

139038720 is an equidigital number, since it uses as much as digits as its factorization.

139038720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 139038720 is about 11791.4681019795. The cubic root of 139038720 is about 518.0582414401.

The spelling of 139038720 in words is "one hundred thirty-nine million, thirty-eight thousand, seven hundred twenty".