428853421 has 8 divisors (see below), whose sum is σ = 455632920. Its totient is φ = 402873408.

The previous prime is 428853413. The next prime is 428853431. The reversal of 428853421 is 124358824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 59675625 + 369177796 = 7725^2 + 19214^2 .

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 428853421 - 2³ = 428853413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428853431) 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, 198766 + ... + 200911.

It is an arithmetic number, because the mean of its divisors is an integer number (56954115).

Almost surely, 2^428853421 is an apocalyptic number.

It is an amenable number.

428853421 is a deficient number, since it is larger than the sum of its proper divisors (26779499).

428853421 is a wasteful number, since it uses less digits than its factorization.

428853421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399743.

The product of its digits is 61440, while the sum is 37.

The square root of 428853421 is about 20708.7764245018. The cubic root of 428853421 is about 754.1127662396.

The spelling of 428853421 in words is "four hundred twenty-eight million, eight hundred fifty-three thousand, four hundred twenty-one".