139949664 has 96 divisors (see below), whose sum is σ = 386394624. Its totient is φ = 44267520.

The previous prime is 139949657. The next prime is 139949683. The reversal of 139949664 is 466949931.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531997 + ... + 532259.

It is an arithmetic number, because the mean of its divisors is an integer number (4024944).

Almost surely, 2^139949664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139949664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193197312).

139949664 is an abundant number, since it is smaller than the sum of its proper divisors (246444960).

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

139949664 is a wasteful number, since it uses less digits than its factorization.

139949664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 532 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 51.

The square root of 139949664 is about 11830.0322907421. The cubic root of 139949664 is about 519.1871719199.

The spelling of 139949664 in words is "one hundred thirty-nine million, nine hundred forty-nine thousand, six hundred sixty-four".