139830810 has 128 divisors (see below), whose sum is σ = 398131200. Its totient is φ = 31413312.

The previous prime is 139830799. The next prime is 139830811. The reversal of 139830810 is 18038931.

It is a super-2 number, since 2×139830810² = 39105310850512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139830811) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1100967 + ... + 1101093.

It is an arithmetic number, because the mean of its divisors is an integer number (3110400).

Almost surely, 2^139830810 is an apocalyptic number.

139830810 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 139830810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199065600).

139830810 is an abundant number, since it is smaller than the sum of its proper divisors (258300390).

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

139830810 is a wasteful number, since it uses less digits than its factorization.

139830810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 139830810 is about 11825.0078224076. The cubic root of 139830810 is about 519.0401548967.

The spelling of 139830810 in words is "one hundred thirty-nine million, eight hundred thirty thousand, eight hundred ten".