423136078 has 4 divisors (see below), whose sum is σ = 634704120. Its totient is φ = 211568038.

The previous prime is 423136027. The next prime is 423136079. The reversal of 423136078 is 870631324.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423136079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105784018 + ... + 105784021.

It is an arithmetic number, because the mean of its divisors is an integer number (158676030).

Almost surely, 2^423136078 is an apocalyptic number.

423136078 is a deficient number, since it is larger than the sum of its proper divisors (211568042).

423136078 is a wasteful number, since it uses less digits than its factorization.

423136078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211568041.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 423136078 is about 20570.2717045741. The cubic root of 423136078 is about 750.7465620950.

The spelling of 423136078 in words is "four hundred twenty-three million, one hundred thirty-six thousand, seventy-eight".