1247395968 has 384 divisors, whose sum is σ = 4505854080. Its totient is φ = 322486272.

The previous prime is 1247395967. The next prime is 1247395973. The reversal of 1247395968 is 8695937421.

1247395968 is a `hidden beast` number, since 1 + 2 + 47 + 3 + 9 + 596 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is not an unprimeable number, because it can be changed into a prime (1247395967) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7652655 + ... + 7652817.

It is an arithmetic number, because the mean of its divisors is an integer number (11733995).

Almost surely, 2^1247395968 is an apocalyptic number.

1247395968 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 1247395968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2252927040).

1247395968 is an abundant number, since it is smaller than the sum of its proper divisors (3258458112).

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

1247395968 is a wasteful number, since it uses less digits than its factorization.

1247395968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 261 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 1247395968 is about 35318.4932860959. The cubic root of 1247395968 is about 1076.4687960596.

The spelling of 1247395968 in words is "one billion, two hundred forty-seven million, three hundred ninety-five thousand, nine hundred sixty-eight".