123445578 has 16 divisors (see below), whose sum is σ = 250939296. Its totient is φ = 40473840.

The previous prime is 123445573. The next prime is 123445583. The reversal of 123445578 is 875544321.

It is an interprime number because it is at equal distance from previous prime (123445573) and next prime (123445583).

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (123445571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168276 + ... + 169007.

It is an arithmetic number, because the mean of its divisors is an integer number (15683706).

Almost surely, 2^123445578 is an apocalyptic number.

123445578 is an abundant number, since it is smaller than the sum of its proper divisors (127493718).

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

123445578 is a wasteful number, since it uses less digits than its factorization.

123445578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337349.

The product of its digits is 134400, while the sum is 39.

The square root of 123445578 is about 11110.6065540996. The cubic root of 123445578 is about 497.9187864532.

Adding to 123445578 its reverse (875544321), we get a palindrome (998989899).

The spelling of 123445578 in words is "one hundred twenty-three million, four hundred forty-five thousand, five hundred seventy-eight".