428342394 has 16 divisors (see below), whose sum is σ = 857825568. Its totient is φ = 142590672.

The previous prime is 428342381. The next prime is 428342399. The reversal of 428342394 is 493243824.

It is a happy number.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 42612 + ... + 51695.

It is an arithmetic number, because the mean of its divisors is an integer number (53614098).

Almost surely, 2^428342394 is an apocalyptic number.

428342394 is an abundant number, since it is smaller than the sum of its proper divisors (429483174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428342394 is a wasteful number, since it uses less digits than its factorization.

428342394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95069.

The product of its digits is 165888, while the sum is 39.

The square root of 428342394 is about 20696.4343305797. The cubic root of 428342394 is about 753.8131105077.

The spelling of 428342394 in words is "four hundred twenty-eight million, three hundred forty-two thousand, three hundred ninety-four".