139632480 has 144 divisors (see below), whose sum is σ = 513218160. Its totient is φ = 34366464.

The previous prime is 139632461. The next prime is 139632557. The reversal of 139632480 is 84236931.

139632480 is a `hidden beast` number, since 13 + 9 + 632 + 4 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14991 + ... + 22449.

It is an arithmetic number, because the mean of its divisors is an integer number (3564015).

Almost surely, 2^139632480 is an apocalyptic number.

139632480 is a gapful number since it is divisible by the number (10) 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 139632480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256609080).

139632480 is an abundant number, since it is smaller than the sum of its proper divisors (373585680).

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

139632480 is a wasteful number, since it uses less digits than its factorization.

139632480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7493 (or 7482 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 139632480 is about 11816.6188057329. The cubic root of 139632480 is about 518.7946440506.

The spelling of 139632480 in words is "one hundred thirty-nine million, six hundred thirty-two thousand, four hundred eighty".