1423218078 has 24 divisors (see below), whose sum is σ = 3089080800. Its totient is φ = 473568864.

The previous prime is 1423218077. The next prime is 1423218107. The reversal of 1423218078 is 8708123241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423218077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59238 + ... + 79721.

It is an arithmetic number, because the mean of its divisors is an integer number (128711700).

Almost surely, 2^1423218078 is an apocalyptic number.

1423218078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1423218078 is an abundant number, since it is smaller than the sum of its proper divisors (1665862722).

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

1423218078 is a wasteful number, since it uses less digits than its factorization.

1423218078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139536 (or 139533 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1423218078 is about 37725.5626598199. The cubic root of 1423218078 is about 1124.8393062330.

The spelling of 1423218078 in words is "one billion, four hundred twenty-three million, two hundred eighteen thousand, seventy-eight".