9528778238 has 48 divisors (see below), whose sum is σ = 17381342880. Its totient is φ = 3899073024.

The previous prime is 9528778213. The next prime is 9528778241. The reversal of 9528778238 is 8328778259.

It is a super-2 number, since 2×9528778238² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1333058 + ... + 1340186.

It is an arithmetic number, because the mean of its divisors is an integer number (362111310).

Almost surely, 2^9528778238 is an apocalyptic number.

9528778238 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

9528778238 is a deficient number, since it is larger than the sum of its proper divisors (7852564642).

9528778238 is a wasteful number, since it uses less digits than its factorization.

9528778238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7761 (or 7754 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 59.

The square root of 9528778238 is about 97615.4610602234. The cubic root of 9528778238 is about 2120.0482246951.

The spelling of 9528778238 in words is "nine billion, five hundred twenty-eight million, seven hundred seventy-eight thousand, two hundred thirty-eight".