258990840 has 48 divisors (see below), whose sum is σ = 841721400. Its totient is φ = 69064128.

The previous prime is 258990827. The next prime is 258990841. The reversal of 258990840 is 48099852.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258990841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359350 + ... + 360069.

Almost surely, 2^258990840 is an apocalyptic number.

258990840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258990840 is an abundant number, since it is smaller than the sum of its proper divisors (582730560).

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

258990840 is a wasteful number, since it uses less digits than its factorization.

258990840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719436 (or 719429 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 258990840 is about 16093.1923495620. The cubic root of 258990840 is about 637.4235940725.

The spelling of 258990840 in words is "two hundred fifty-eight million, nine hundred ninety thousand, eight hundred forty".