258191420 has 24 divisors (see below), whose sum is σ = 548738064. Its totient is φ = 102031616.

The previous prime is 258191413. The next prime is 258191441. The reversal of 258191420 is 24191852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76109 + ... + 79428.

It is an arithmetic number, because the mean of its divisors is an integer number (22864086).

Almost surely, 2^258191420 is an apocalyptic number.

258191420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258191420 is an abundant number, since it is smaller than the sum of its proper divisors (290546644).

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

258191420 is a wasteful number, since it uses less digits than its factorization.

258191420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155629 (or 155627 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 258191420 is about 16068.3359437124. The cubic root of 258191420 is about 636.7670787537.

The spelling of 258191420 in words is "two hundred fifty-eight million, one hundred ninety-one thousand, four hundred twenty".