428342393 has 4 divisors (see below), whose sum is σ = 438303888. Its totient is φ = 418380900.

The previous prime is 428342381. The next prime is 428342399. The reversal of 428342393 is 393243824.

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 428342393 - 2¹⁰ = 428341369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428342399) 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, 4980683 + ... + 4980768.

It is an arithmetic number, because the mean of its divisors is an integer number (109575972).

Almost surely, 2^428342393 is an apocalyptic number.

428342393 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

428342393 is a deficient number, since it is larger than the sum of its proper divisors (9961495).

428342393 is an equidigital number, since it uses as much as digits as its factorization.

428342393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9961494.

The product of its digits is 124416, while the sum is 38.

The square root of 428342393 is about 20696.4343064210. The cubic root of 428342393 is about 753.8131099210.

The spelling of 428342393 in words is "four hundred twenty-eight million, three hundred forty-two thousand, three hundred ninety-three".