423756404 has 6 divisors (see below), whose sum is σ = 741573714. Its totient is φ = 211878200.

The previous prime is 423756367. The next prime is 423756409. The reversal of 423756404 is 404657324.

It can be written as a sum of positive squares in only one way, i.e., 318693904 + 105062500 = 17852^2 + 10250^2 .

It is a super-2 number, since 2×423756404² = 359138979862022432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423756409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52969547 + ... + 52969554.

It is an arithmetic number, because the mean of its divisors is an integer number (123595619).

Almost surely, 2^423756404 is an apocalyptic number.

It is an amenable number.

423756404 is a deficient number, since it is larger than the sum of its proper divisors (317817310).

423756404 is a wasteful number, since it uses less digits than its factorization.

423756404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105939105 (or 105939103 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 35.

The square root of 423756404 is about 20585.3443983821. The cubic root of 423756404 is about 751.1132528140.

The spelling of 423756404 in words is "four hundred twenty-three million, seven hundred fifty-six thousand, four hundred four".