139552644 has 96 divisors (see below), whose sum is σ = 427392000. Its totient is φ = 34335360.

The previous prime is 139552619. The next prime is 139552681. The reversal of 139552644 is 446255931.

It is a super-3 number, since 3×139552644³ (a number of 25 digits) contains 333 as substring.

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 31 ways as a sum of consecutive naturals, for example, 13582 + ... + 21530.

It is an arithmetic number, because the mean of its divisors is an integer number (4452000).

Almost surely, 2^139552644 is an apocalyptic number.

139552644 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 139552644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213696000).

139552644 is an abundant number, since it is smaller than the sum of its proper divisors (287839356).

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

139552644 is a wasteful number, since it uses less digits than its factorization.

139552644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7993 (or 7991 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 139552644 is about 11813.2401990309. The cubic root of 139552644 is about 518.6957501889.

The spelling of 139552644 in words is "one hundred thirty-nine million, five hundred fifty-two thousand, six hundred forty-four".