451669428 has 36 divisors (see below), whose sum is σ = 1304823520. Its totient is φ = 129048336.

The previous prime is 451669417. The next prime is 451669433. The reversal of 451669428 is 824966154.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 895918 + ... + 896421.

Almost surely, 2^451669428 is an apocalyptic number.

It is an amenable number.

451669428 is an abundant number, since it is smaller than the sum of its proper divisors (853154092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451669428 is a wasteful number, since it uses less digits than its factorization.

451669428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792356 (or 1792351 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 451669428 is about 21252.5158040172. The cubic root of 451669428 is about 767.2558914144.

The spelling of 451669428 in words is "four hundred fifty-one million, six hundred sixty-nine thousand, four hundred twenty-eight".