139469664 has 24 divisors (see below), whose sum is σ = 366108120. Its totient is φ = 46489856.

The previous prime is 139469647. The next prime is 139469669. The reversal of 139469664 is 466964931.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139469669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726309 + ... + 726500.

It is an arithmetic number, because the mean of its divisors is an integer number (15254505).

Almost surely, 2^139469664 is an apocalyptic number.

It is an amenable number.

139469664 is an abundant number, since it is smaller than the sum of its proper divisors (226638456).

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

139469664 is a wasteful number, since it uses less digits than its factorization.

139469664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452822 (or 1452814 counting only the distinct ones).

The product of its digits is 839808, while the sum is 48.

The square root of 139469664 is about 11809.7275159082. The cubic root of 139469664 is about 518.5929218321.

The spelling of 139469664 in words is "one hundred thirty-nine million, four hundred sixty-nine thousand, six hundred sixty-four".