428383081 has 4 divisors (see below), whose sum is σ = 489580672. Its totient is φ = 367185492.

The previous prime is 428383061. The next prime is 428383091. The reversal of 428383081 is 180383824.

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 428383081 - 2⁵ = 428383049 is a prime.

It is a super-2 number, since 2×428383081² = 367024128174105122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 428383081.

It is not an unprimeable number, because it can be changed into a prime (428383031) 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, 30598785 + ... + 30598798.

It is an arithmetic number, because the mean of its divisors is an integer number (122395168).

Almost surely, 2^428383081 is an apocalyptic number.

It is an amenable number.

428383081 is a deficient number, since it is larger than the sum of its proper divisors (61197591).

428383081 is an equidigital number, since it uses as much as digits as its factorization.

428383081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61197590.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 428383081 is about 20697.4172543339. The cubic root of 428383081 is about 753.8369772580.

The spelling of 428383081 in words is "four hundred twenty-eight million, three hundred eighty-three thousand, eighty-one".