42451328 has 16 divisors (see below), whose sum is σ = 84571260. Its totient is φ = 21225600.

The previous prime is 42451327. The next prime is 42451349. The reversal of 42451328 is 82315424.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 42451328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42451327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165698 + ... + 165953.

Almost surely, 2^42451328 is an apocalyptic number.

It is an amenable number.

42451328 is a deficient number, since it is larger than the sum of its proper divisors (42119932).

42451328 is an equidigital number, since it uses as much as digits as its factorization.

42451328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331665 (or 331653 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 42451328 is about 6515.4683638247. The cubic root of 42451328 is about 348.8433327192.

The spelling of 42451328 in words is "forty-two million, four hundred fifty-one thousand, three hundred twenty-eight".