7428581838 has 48 divisors (see below), whose sum is σ = 16361064720. Its totient is φ = 2435565312.

The previous prime is 7428581833. The next prime is 7428581857. The reversal of 7428581838 is 8381858247.

7428581838 is a `hidden beast` number, since 7 + 4 + 28 + 581 + 8 + 38 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7428581833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331270 + ... + 352982.

It is an arithmetic number, because the mean of its divisors is an integer number (340855515).

Almost surely, 2^7428581838 is an apocalyptic number.

7428581838 is an abundant number, since it is smaller than the sum of its proper divisors (8932482882).

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

7428581838 is a wasteful number, since it uses less digits than its factorization.

7428581838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22033 (or 22030 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 54.

The square root of 7428581838 is about 86189.2211242218. The cubic root of 7428581838 is about 1951.2008240802.

The spelling of 7428581838 in words is "seven billion, four hundred twenty-eight million, five hundred eighty-one thousand, eight hundred thirty-eight".