139887006 has 64 divisors (see below), whose sum is σ = 338257920. Its totient is φ = 37674720.

The previous prime is 139886983. The next prime is 139887019. The reversal of 139887006 is 600788931.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244701 + ... + 245271.

It is an arithmetic number, because the mean of its divisors is an integer number (5285280).

Almost surely, 2^139887006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139887006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169128960).

139887006 is an abundant number, since it is smaller than the sum of its proper divisors (198370914).

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

139887006 is a wasteful number, since it uses less digits than its factorization.

139887006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 139887006 is about 11827.3837343683. The cubic root of 139887006 is about 519.1096771859.

The spelling of 139887006 in words is "one hundred thirty-nine million, eight hundred eighty-seven thousand, six".