7725731998 has 32 divisors (see below), whose sum is σ = 11954882016. Its totient is φ = 3742384128.

The previous prime is 7725731983. The next prime is 7725731999. The reversal of 7725731998 is 8991375277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7725731999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6475290 + ... + 6476482.

It is an arithmetic number, because the mean of its divisors is an integer number (373590063).

Almost surely, 2^7725731998 is an apocalyptic number.

7725731998 is a deficient number, since it is larger than the sum of its proper divisors (4229150018).

7725731998 is a wasteful number, since it uses less digits than its factorization.

7725731998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788.

The product of its digits is 6667920, while the sum is 58.

The square root of 7725731998 is about 87896.1432487228. The cubic root of 7725731998 is about 1976.8780510348.

The spelling of 7725731998 in words is "seven billion, seven hundred twenty-five million, seven hundred thirty-one thousand, nine hundred ninety-eight".