423726642 has 12 divisors (see below), whose sum is σ = 918074430. Its totient is φ = 141242208.

The previous prime is 423726637. The next prime is 423726643. The reversal of 423726642 is 246627324.

423726642 is a `hidden beast` number, since 4 + 2 + 3 + 7 + 2 + 6 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 371756961 + 51969681 = 19281^2 + 7209^2 .

It is a junction number, because it is equal to n+sod(n) for n = 423726597 and 423726606.

It is not an unprimeable number, because it can be changed into a prime (423726643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11770167 + ... + 11770202.

Almost surely, 2^423726642 is an apocalyptic number.

423726642 is an abundant number, since it is smaller than the sum of its proper divisors (494347788).

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

423726642 is a wasteful number, since it uses less digits than its factorization.

423726642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23540377 (or 23540374 counting only the distinct ones).

The product of its digits is 96768, while the sum is 36.

The square root of 423726642 is about 20584.6214927552. The cubic root of 423726642 is about 751.0956679030.

The spelling of 423726642 in words is "four hundred twenty-three million, seven hundred twenty-six thousand, six hundred forty-two".