1223459478 has 40 divisors (see below), whose sum is σ = 2805226248. Its totient is φ = 398333376.

The previous prime is 1223459449. The next prime is 1223459483. The reversal of 1223459478 is 8749543221.

1223459478 is a `hidden beast` number, since 1 + 22 + 34 + 594 + 7 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 80851 + ... + 94782.

Almost surely, 2^1223459478 is an apocalyptic number.

1223459478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1223459478 is an abundant number, since it is smaller than the sum of its proper divisors (1581766770).

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

1223459478 is a wasteful number, since it uses less digits than its factorization.

1223459478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175690 (or 175681 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 1223459478 is about 34977.9856195293. The cubic root of 1223459478 is about 1069.5387647274.

It can be divided in two parts, 122 and 3459478, that added together give a square (3459600 = 1860²).

The spelling of 1223459478 in words is "one billion, two hundred twenty-three million, four hundred fifty-nine thousand, four hundred seventy-eight".