258019938 has 32 divisors (see below), whose sum is σ = 625504320. Its totient is φ = 78187680.

The previous prime is 258019919. The next prime is 258019939. The reversal of 258019938 is 839910852.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 258019893 and 258019902.

It is not an unprimeable number, because it can be changed into a prime (258019939) 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, 216595 + ... + 217782.

It is an arithmetic number, because the mean of its divisors is an integer number (19547010).

Almost surely, 2^258019938 is an apocalyptic number.

258019938 is an abundant number, since it is smaller than the sum of its proper divisors (367484382).

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

258019938 is a wasteful number, since it uses less digits than its factorization.

258019938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434399 (or 434393 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 258019938 is about 16062.9990350495. Note that the first 3 decimals coincide. The cubic root of 258019938 is about 636.6260744871.

The spelling of 258019938 in words is "two hundred fifty-eight million, nineteen thousand, nine hundred thirty-eight".