428266401 has 4 divisors (see below), whose sum is σ = 571021872. Its totient is φ = 285510932.

The previous prime is 428266381. The next prime is 428266483. The reversal of 428266401 is 104662824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428266401 - 2⁶ = 428266337 is a prime.

It is a super-2 number, since 2×428266401² = 366824220450985602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428266301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71377731 + ... + 71377736.

It is an arithmetic number, because the mean of its divisors is an integer number (142755468).

Almost surely, 2^428266401 is an apocalyptic number.

It is an amenable number.

428266401 is a deficient number, since it is larger than the sum of its proper divisors (142755471).

428266401 is a wasteful number, since it uses less digits than its factorization.

428266401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142755470.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 428266401 is about 20694.5983531935. The cubic root of 428266401 is about 753.7685294214.

The spelling of 428266401 in words is "four hundred twenty-eight million, two hundred sixty-six thousand, four hundred one".