428342765 has 4 divisors (see below), whose sum is σ = 514011324. Its totient is φ = 342674208.

The previous prime is 428342749. The next prime is 428342791. The reversal of 428342765 is 567243824.

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

It can be written as a sum of positive squares in 2 ways, for example, as 121462441 + 306880324 = 11021^2 + 17518^2 .

It is a cyclic number.

It is not a de Polignac number, because 428342765 - 2⁴ = 428342749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42834272 + ... + 42834281.

It is an arithmetic number, because the mean of its divisors is an integer number (128502831).

Almost surely, 2^428342765 is an apocalyptic number.

It is an amenable number.

428342765 is a deficient number, since it is larger than the sum of its proper divisors (85668559).

428342765 is an equidigital number, since it uses as much as digits as its factorization.

428342765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85668558.

The product of its digits is 322560, while the sum is 41.

The square root of 428342765 is about 20696.4432934744. The cubic root of 428342765 is about 753.8133281409.

The spelling of 428342765 in words is "four hundred twenty-eight million, three hundred forty-two thousand, seven hundred sixty-five".