428727929 has 4 divisors (see below), whose sum is σ = 489974784. Its totient is φ = 367481076.

The previous prime is 428727919. The next prime is 428727941. The reversal of 428727929 is 929727824.

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 428727929 - 2¹⁶ = 428662393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428727919) 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, 30623417 + ... + 30623430.

It is an arithmetic number, because the mean of its divisors is an integer number (122493696).

Almost surely, 2^428727929 is an apocalyptic number.

It is an amenable number.

428727929 is a deficient number, since it is larger than the sum of its proper divisors (61246855).

428727929 is an equidigital number, since it uses as much as digits as its factorization.

428727929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61246854.

The product of its digits is 1016064, while the sum is 50.

The square root of 428727929 is about 20705.7462797167. The cubic root of 428727929 is about 754.0392023699.

The spelling of 428727929 in words is "four hundred twenty-eight million, seven hundred twenty-seven thousand, nine hundred twenty-nine".