258283640 has 16 divisors (see below), whose sum is σ = 581138280. Its totient is φ = 103313440.

The previous prime is 258283639. The next prime is 258283667. The reversal of 258283640 is 46382852.

258283640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 258283594 and 258283603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3228506 + ... + 3228585.

Almost surely, 2^258283640 is an apocalyptic number.

258283640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258283640 is an abundant number, since it is smaller than the sum of its proper divisors (322854640).

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

258283640 is a wasteful number, since it uses less digits than its factorization.

258283640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6457102 (or 6457098 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 258283640 is about 16071.2053063857. The cubic root of 258283640 is about 636.8428825507.

The spelling of 258283640 in words is "two hundred fifty-eight million, two hundred eighty-three thousand, six hundred forty".