7647997398 has 48 divisors (see below), whose sum is σ = 16155448176. Its totient is φ = 2413255680.

The previous prime is 7647997393. The next prime is 7647997471. The reversal of 7647997398 is 8937997467.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7647997391) 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, 295458 + ... + 320298.

It is an arithmetic number, because the mean of its divisors is an integer number (336571837).

Almost surely, 2^7647997398 is an apocalyptic number.

7647997398 is an abundant number, since it is smaller than the sum of its proper divisors (8507450778).

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

7647997398 is a wasteful number, since it uses less digits than its factorization.

7647997398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24989 (or 24966 counting only the distinct ones).

The product of its digits is 144027072, while the sum is 69.

The square root of 7647997398 is about 87452.8295597118. The cubic root of 7647997398 is about 1970.2253856724.

Adding to 7647997398 its sum of digits (69), we get a palindrome (7647997467).

The spelling of 7647997398 in words is "seven billion, six hundred forty-seven million, nine hundred ninety-seven thousand, three hundred ninety-eight".