428857894 has 4 divisors (see below), whose sum is σ = 643286844. Its totient is φ = 214428946.

The previous prime is 428857883. The next prime is 428857901. The reversal of 428857894 is 498758824.

It is a happy number.

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

It is a super-2 number, since 2×428857894² = 367838186492230472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107214472 + ... + 107214475.

It is an arithmetic number, because the mean of its divisors is an integer number (160821711).

Almost surely, 2^428857894 is an apocalyptic number.

428857894 is a deficient number, since it is larger than the sum of its proper divisors (214428950).

428857894 is a wasteful number, since it uses less digits than its factorization.

428857894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214428949.

The product of its digits is 5160960, while the sum is 55.

The square root of 428857894 is about 20708.8844219094. The cubic root of 428857894 is about 754.1153880637.

The spelling of 428857894 in words is "four hundred twenty-eight million, eight hundred fifty-seven thousand, eight hundred ninety-four".