139626284 has 72 divisors (see below), whose sum is σ = 303367680. Its totient is φ = 55935264.

The previous prime is 139626283. The next prime is 139626299. The reversal of 139626284 is 482626931.

It is not an unprimeable number, because it can be changed into a prime (139626281) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 211547 + ... + 212205.

It is an arithmetic number, because the mean of its divisors is an integer number (4213440).

Almost surely, 2^139626284 is an apocalyptic number.

139626284 is a gapful number since it is divisible by the number (14) 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 139626284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151683840).

139626284 is an abundant number, since it is smaller than the sum of its proper divisors (163741396).

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

139626284 is a wasteful number, since it uses less digits than its factorization.

139626284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 738 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 139626284 is about 11816.3566296892. The cubic root of 139626284 is about 518.7869703365.

The spelling of 139626284 in words is "one hundred thirty-nine million, six hundred twenty-six thousand, two hundred eighty-four".