428641594 has 4 divisors (see below), whose sum is σ = 642962394. Its totient is φ = 214320796.

The previous prime is 428641579. The next prime is 428641649. The reversal of 428641594 is 495146824.

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

It can be written as a sum of positive squares in only one way, i.e., 413919025 + 14722569 = 20345^2 + 3837^2 .

It is a super-2 number, since 2×428641594² = 367467232213721672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 428641594.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107160397 + ... + 107160400.

Almost surely, 2^428641594 is an apocalyptic number.

428641594 is a deficient number, since it is larger than the sum of its proper divisors (214320800).

428641594 is a wasteful number, since it uses less digits than its factorization.

428641594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214320799.

The product of its digits is 276480, while the sum is 43.

The square root of 428641594 is about 20703.6613670143. The cubic root of 428641594 is about 753.9885841414.

The spelling of 428641594 in words is "four hundred twenty-eight million, six hundred forty-one thousand, five hundred ninety-four".