423038918 has 4 divisors (see below), whose sum is σ = 634558380. Its totient is φ = 211519458.

The previous prime is 423038911. The next prime is 423038947. The reversal of 423038918 is 819830324.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×423038918² = 357923852285221448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423038911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105759728 + ... + 105759731.

It is an arithmetic number, because the mean of its divisors is an integer number (158639595).

Almost surely, 2^423038918 is an apocalyptic number.

423038918 is a deficient number, since it is larger than the sum of its proper divisors (211519462).

423038918 is a wasteful number, since it uses less digits than its factorization.

423038918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211519461.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 423038918 is about 20567.9099083986. The cubic root of 423038918 is about 750.6890958538.

The spelling of 423038918 in words is "four hundred twenty-three million, thirty-eight thousand, nine hundred eighteen".