139918464 has 96 divisors (see below), whose sum is σ = 460175040. Its totient is φ = 39974400.

The previous prime is 139918459. The next prime is 139918477. The reversal of 139918464 is 464819931.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 612 + ... + 16739.

It is an arithmetic number, because the mean of its divisors is an integer number (4793490).

Almost surely, 2^139918464 is an apocalyptic number.

139918464 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 139918464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230087520).

139918464 is an abundant number, since it is smaller than the sum of its proper divisors (320256576).

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

139918464 is a wasteful number, since it uses less digits than its factorization.

139918464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17378 (or 17363 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 139918464 is about 11828.7135395190. The cubic root of 139918464 is about 519.1485869906.

The spelling of 139918464 in words is "one hundred thirty-nine million, nine hundred eighteen thousand, four hundred sixty-four".