7923132438 has 64 divisors (see below), whose sum is σ = 18096099840. Its totient is φ = 2291046912.

The previous prime is 7923132433. The next prime is 7923132439. The reversal of 7923132438 is 8342313297.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7923132438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7923132433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 959893 + ... + 968111.

It is an arithmetic number, because the mean of its divisors is an integer number (282751560).

Almost surely, 2^7923132438 is an apocalyptic number.

7923132438 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7923132438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9048049920).

7923132438 is an abundant number, since it is smaller than the sum of its proper divisors (10172967402).

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

7923132438 is a wasteful number, since it uses less digits than its factorization.

7923132438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8981.

The product of its digits is 217728, while the sum is 42.

The square root of 7923132438 is about 89011.9791825797. The cubic root of 7923132438 is about 1993.5737435627.

The spelling of 7923132438 in words is "seven billion, nine hundred twenty-three million, one hundred thirty-two thousand, four hundred thirty-eight".