423828421 has 8 divisors (see below), whose sum is σ = 450554400. Its totient is φ = 397544400.

The previous prime is 423828347. The next prime is 423828467. The reversal of 423828421 is 124828324.

423828421 = 4714² + 4715² + ... + 4732².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 423828421 - 2¹⁵ = 423795653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423828481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108511 + ... + 112348.

It is an arithmetic number, because the mean of its divisors is an integer number (56319300).

Almost surely, 2^423828421 is an apocalyptic number.

It is an amenable number.

423828421 is a deficient number, since it is larger than the sum of its proper divisors (26725979).

423828421 is a wasteful number, since it uses less digits than its factorization.

423828421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220979.

The product of its digits is 24576, while the sum is 34.

The square root of 423828421 is about 20587.0935539721. The cubic root of 423828421 is about 751.1558007327.

The spelling of 423828421 in words is "four hundred twenty-three million, eight hundred twenty-eight thousand, four hundred twenty-one".