428646277 has 4 divisors (see below), whose sum is σ = 428698656. Its totient is φ = 428593900.

The previous prime is 428646271. The next prime is 428646287. The reversal of 428646277 is 772646824.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428646277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428646271) 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, 10963 + ... + 31264.

It is an arithmetic number, because the mean of its divisors is an integer number (107174664).

Almost surely, 2^428646277 is an apocalyptic number.

It is an amenable number.

428646277 is a deficient number, since it is larger than the sum of its proper divisors (52379).

428646277 is a wasteful number, since it uses less digits than its factorization.

428646277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52378.

The product of its digits is 903168, while the sum is 46.

The square root of 428646277 is about 20703.7744626433. The cubic root of 428646277 is about 753.9913299596.

It can be divided in two parts, 42864 and 6277, that added together give a triangular number (49141 = T₃₁₃).

The spelling of 428646277 in words is "four hundred twenty-eight million, six hundred forty-six thousand, two hundred seventy-seven".