428939227 has 4 divisors (see below), whose sum is σ = 431570920. Its totient is φ = 426307536.

The previous prime is 428939221. The next prime is 428939237. The reversal of 428939227 is 722939824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428939227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428939221) 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, 1315602 + ... + 1315927.

It is an arithmetic number, because the mean of its divisors is an integer number (107892730).

Almost surely, 2^428939227 is an apocalyptic number.

428939227 is a deficient number, since it is larger than the sum of its proper divisors (2631693).

428939227 is a wasteful number, since it uses less digits than its factorization.

428939227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631692.

The product of its digits is 435456, while the sum is 46.

The square root of 428939227 is about 20710.8480512025. The cubic root of 428939227 is about 754.1630577703.

The spelling of 428939227 in words is "four hundred twenty-eight million, nine hundred thirty-nine thousand, two hundred twenty-seven".