1239074461728 has 144 divisors (see below), whose sum is σ = 3539915379000. Its totient is φ = 411116175360.

The previous prime is 1239074461727. The next prime is 1239074461739. The reversal of 1239074461728 is 8271644709321.

1239074461728 is a `hidden beast` number, since 1 + 2 + 3 + 90 + 74 + 461 + 7 + 28 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 786861250704 + 452213211024 = 887052^2 + 672468^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1239074461721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281030788 + ... + 281035196.

Almost surely, 2^{1239074461728} is an apocalyptic number.

1239074461728 is a gapful number since it is divisible by the number (18) 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 1239074461728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769957689500).

1239074461728 is an abundant number, since it is smaller than the sum of its proper divisors (2300840917272).

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

1239074461728 is a wasteful number, since it uses less digits than its factorization.

1239074461728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8715 (or 8704 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 1239074461728 in words is "one trillion, two hundred thirty-nine billion, seventy-four million, four hundred sixty-one thousand, seven hundred twenty-eight".