428161601 has 4 divisors (see below), whose sum is σ = 489327552. Its totient is φ = 366995652.

The previous prime is 428161549. The next prime is 428161619. The reversal of 428161601 is 106161824.

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 428161601 - 2²⁶ = 361052737 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (428161001) 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, 30582965 + ... + 30582978.

It is an arithmetic number, because the mean of its divisors is an integer number (122331888).

Almost surely, 2^428161601 is an apocalyptic number.

It is an amenable number.

428161601 is a deficient number, since it is larger than the sum of its proper divisors (61165951).

428161601 is an equidigital number, since it uses as much as digits as its factorization.

428161601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61165950.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 428161601 is about 20692.0661365655. The cubic root of 428161601 is about 753.7070401348.

The spelling of 428161601 in words is "four hundred twenty-eight million, one hundred sixty-one thousand, six hundred one".