239478579648 has 672 divisors, whose sum is σ = 898201221120. Its totient is φ = 61869588480.

The previous prime is 239478579617. The next prime is 239478579797. The reversal of 239478579648 is 846975874932.

239478579648 is a `hidden beast` number, since 2 + 3 + 9 + 4 + 7 + 8 + 579 + 6 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a super-2 number, since 2×239478579648² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 207699840 + ... + 207700992.

It is an arithmetic number, because the mean of its divisors is an integer number (1336608960).

Almost surely, 2^239478579648 is an apocalyptic number.

239478579648 is a gapful number since it is divisible by the number (28) 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 239478579648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449100610560).

239478579648 is an abundant number, since it is smaller than the sum of its proper divisors (658722641472).

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

239478579648 is a wasteful number, since it uses less digits than its factorization.

239478579648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 1399 counting only the distinct ones).

The product of its digits is 731566080, while the sum is 72.

The spelling of 239478579648 in words is "two hundred thirty-nine billion, four hundred seventy-eight million, five hundred seventy-nine thousand, six hundred forty-eight".