428097493 has 8 divisors (see below), whose sum is σ = 452387520. Its totient is φ = 403983360.

The previous prime is 428097491. The next prime is 428097521. The reversal of 428097493 is 394790824.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428097493 - 2¹ = 428097491 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 (428097491) 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, 38953 + ... + 48718.

It is an arithmetic number, because the mean of its divisors is an integer number (56548440).

Almost surely, 2^428097493 is an apocalyptic number.

It is an amenable number.

428097493 is a deficient number, since it is larger than the sum of its proper divisors (24290027).

428097493 is a wasteful number, since it uses less digits than its factorization.

428097493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87947.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 428097493 is about 20690.5169824246. The cubic root of 428097493 is about 753.6694211124.

The spelling of 428097493 in words is "four hundred twenty-eight million, ninety-seven thousand, four hundred ninety-three".