139474944 has 288 divisors, whose sum is σ = 490613760. Its totient is φ = 37306368.

The previous prime is 139474939. The next prime is 139474957. The reversal of 139474944 is 449474931.

139474944 is a `hidden beast` number, since 139 + 474 + 9 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a self number, because there is not a number n which added to its sum of digits gives 139474944.

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, 2967529 + ... + 2967575.

It is an arithmetic number, because the mean of its divisors is an integer number (1703520).

Almost surely, 2^139474944 is an apocalyptic number.

139474944 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 139474944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245306880).

139474944 is an abundant number, since it is smaller than the sum of its proper divisors (351138816).

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

139474944 is a wasteful number, since it uses less digits than its factorization.

139474944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 82 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 139474944 is about 11809.9510583237. The cubic root of 139474944 is about 518.5994659938.

The spelling of 139474944 in words is "one hundred thirty-nine million, four hundred seventy-four thousand, nine hundred forty-four".