258949138 has 48 divisors (see below), whose sum is σ = 483312960. Its totient is φ = 101645280.

The previous prime is 258949133. The next prime is 258949237. The reversal of 258949138 is 831949852.

It is a junction number, because it is equal to n+sod(n) for n = 258949091 and 258949100.

It is not an unprimeable number, because it can be changed into a prime (258949133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255120 + ... + 256132.

It is an arithmetic number, because the mean of its divisors is an integer number (10069020).

Almost surely, 2^258949138 is an apocalyptic number.

258949138 is a deficient number, since it is larger than the sum of its proper divisors (224363822).

258949138 is a wasteful number, since it uses less digits than its factorization.

258949138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103 (or 1072 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 258949138 is about 16091.8966563920. The cubic root of 258949138 is about 637.3893801654.

The spelling of 258949138 in words is "two hundred fifty-eight million, nine hundred forty-nine thousand, one hundred thirty-eight".