538123998 has 16 divisors (see below), whose sum is σ = 1079690256. Its totient is φ = 178800960.

The previous prime is 538123991. The next prime is 538124011. The reversal of 538123998 is 899321835.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538123991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141393 + ... + 145148.

It is an arithmetic number, because the mean of its divisors is an integer number (67480641).

Almost surely, 2^538123998 is an apocalyptic number.

538123998 is an abundant number, since it is smaller than the sum of its proper divisors (541566258).

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

538123998 is a wasteful number, since it uses less digits than its factorization.

538123998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286859.

The product of its digits is 466560, while the sum is 48.

The square root of 538123998 is about 23197.4998221791. The cubic root of 538123998 is about 813.3811810440.

The spelling of 538123998 in words is "five hundred thirty-eight million, one hundred twenty-three thousand, nine hundred ninety-eight".