7725239838 has 32 divisors (see below), whose sum is σ = 17179552800. Its totient is φ = 2573227008.

The previous prime is 7725239831. The next prime is 7725239911. The reversal of 7725239838 is 8389325277.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7725239831) 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 15 ways as a sum of consecutive naturals, for example, 25320 + ... + 126852.

It is an arithmetic number, because the mean of its divisors is an integer number (536861025).

Almost surely, 2^7725239838 is an apocalyptic number.

7725239838 is an abundant number, since it is smaller than the sum of its proper divisors (9454312962).

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

7725239838 is a wasteful number, since it uses less digits than its factorization.

7725239838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102953 (or 102947 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 7725239838 is about 87893.3435363566. The cubic root of 7725239838 is about 1976.8360717996.

The spelling of 7725239838 in words is "seven billion, seven hundred twenty-five million, two hundred thirty-nine thousand, eight hundred thirty-eight".