258017820 has 24 divisors (see below), whose sum is σ = 722450064. Its totient is φ = 68804736.

The previous prime is 258017803. The next prime is 258017821. The reversal of 258017820 is 28710852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258017821) 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, 2150089 + ... + 2150208.

It is an arithmetic number, because the mean of its divisors is an integer number (30102086).

Almost surely, 2^258017820 is an apocalyptic number.

258017820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258017820 is an abundant number, since it is smaller than the sum of its proper divisors (464432244).

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

258017820 is a wasteful number, since it uses less digits than its factorization.

258017820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300309 (or 4300307 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 258017820 is about 16062.9331070013. The cubic root of 258017820 is about 636.6243325317.

The spelling of 258017820 in words is "two hundred fifty-eight million, seventeen thousand, eight hundred twenty".