428767551 has 12 divisors (see below), whose sum is σ = 619530912. Its totient is φ = 285752736.

The previous prime is 428767531. The next prime is 428767553. The reversal of 428767551 is 155767824.

428767551 is a `hidden beast` number, since 4 + 28 + 76 + 7 + 551 = 666.

It is not a de Polignac number, because 428767551 - 2⁵ = 428767519 is a prime.

It is a super-2 number, since 2×428767551² = 367683225581075202, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 428767497 and 428767506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428767553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33130 + ... + 44216.

It is an arithmetic number, because the mean of its divisors is an integer number (51627576).

Almost surely, 2^428767551 is an apocalyptic number.

428767551 is a deficient number, since it is larger than the sum of its proper divisors (190763361).

428767551 is a wasteful number, since it uses less digits than its factorization.

428767551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15390 (or 15387 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 428767551 is about 20706.7030451494. The cubic root of 428767551 is about 754.0624304819.

The spelling of 428767551 in words is "four hundred twenty-eight million, seven hundred sixty-seven thousand, five hundred fifty-one".