428949511 has 8 divisors (see below), whose sum is σ = 451142784. Its totient is φ = 407278560.

The previous prime is 428949509. The next prime is 428949523. The reversal of 428949511 is 115949824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428949511 - 2¹ = 428949509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428949571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128896 + ... + 132181.

It is an arithmetic number, because the mean of its divisors is an integer number (56392848).

Almost surely, 2^428949511 is an apocalyptic number.

428949511 is a deficient number, since it is larger than the sum of its proper divisors (22193273).

428949511 is a wasteful number, since it uses less digits than its factorization.

428949511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261161.

The product of its digits is 103680, while the sum is 43.

The square root of 428949511 is about 20711.0963254001. The cubic root of 428949511 is about 754.1690848486.

The spelling of 428949511 in words is "four hundred twenty-eight million, nine hundred forty-nine thousand, five hundred eleven".