139338810 has 72 divisors (see below), whose sum is σ = 392335164. Its totient is φ = 34295040.

The previous prime is 139338809. The next prime is 139338833. The reversal of 139338810 is 18833931.

It can be written as a sum of positive squares in 6 ways, for example, as 7800849 + 131537961 = 2793^2 + 11469^2 .

It is a super-2 number, since 2×139338810² = 38830607944432200, which contains 22 as substring.

It is a Curzon number.

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 35 ways as a sum of consecutive naturals, for example, 10630 + ... + 19790.

Almost surely, 2^139338810 is an apocalyptic number.

139338810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139338810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196167582).

139338810 is an abundant number, since it is smaller than the sum of its proper divisors (252996354).

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

139338810 is a wasteful number, since it uses less digits than its factorization.

139338810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9200 (or 9184 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 139338810 is about 11804.1861218807. The cubic root of 139338810 is about 518.4306853764.

The spelling of 139338810 in words is "one hundred thirty-nine million, three hundred thirty-eight thousand, eight hundred ten".