247395379140 has 672 divisors, whose sum is σ = 964540147200. Its totient is φ = 51879979008.

The previous prime is 247395379123. The next prime is 247395379141. The reversal of 247395379140 is 41973593742.

247395379140 is a `hidden beast` number, since 2 + 47 + 3 + 95 + 379 + 140 = 666.

It is a super-2 number, since 2×247395379140² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (247395379141) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 264028752 + ... + 264029688.

It is an arithmetic number, because the mean of its divisors is an integer number (1435327600).

Almost surely, 2^247395379140 is an apocalyptic number.

247395379140 is a gapful number since it is divisible by the number (20) 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 247395379140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482270073600).

247395379140 is an abundant number, since it is smaller than the sum of its proper divisors (717144768060).

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

247395379140 is a wasteful number, since it uses less digits than its factorization.

247395379140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1166 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 54.

The spelling of 247395379140 in words is "two hundred forty-seven billion, three hundred ninety-five million, three hundred seventy-nine thousand, one hundred forty".