259338978 has 48 divisors (see below), whose sum is σ = 602181216. Its totient is φ = 80373120.

The previous prime is 259338941. The next prime is 259338979. The reversal of 259338978 is 879833952.

It is a happy number.

259338978 is a `hidden beast` number, since 259 + 3 + 389 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (259338979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20293 + ... + 30503.

It is an arithmetic number, because the mean of its divisors is an integer number (12545442).

Almost surely, 2^259338978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 259338978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301090608).

259338978 is an abundant number, since it is smaller than the sum of its proper divisors (342842238).

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

259338978 is a wasteful number, since it uses less digits than its factorization.

259338978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10319 (or 10316 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 259338978 is about 16104.0050298055. The cubic root of 259338978 is about 637.7090765211.

The spelling of 259338978 in words is "two hundred fifty-nine million, three hundred thirty-eight thousand, nine hundred seventy-eight".