428994994 has 4 divisors (see below), whose sum is σ = 643492494. Its totient is φ = 214497496.

The previous prime is 428994971. The next prime is 428995003. The reversal of 428994994 is 499499824.

It is a happy number.

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., 402523969 + 26471025 = 20063^2 + 5145^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107248747 + ... + 107248750.

Almost surely, 2^428994994 is an apocalyptic number.

428994994 is a deficient number, since it is larger than the sum of its proper divisors (214497500).

428994994 is a wasteful number, since it uses less digits than its factorization.

428994994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214497499.

The product of its digits is 6718464, while the sum is 58.

The square root of 428994994 is about 20712.1943308767. The cubic root of 428994994 is about 754.1957396252.

The spelling of 428994994 in words is "four hundred twenty-eight million, nine hundred ninety-four thousand, nine hundred ninety-four".