458878640 has 80 divisors (see below), whose sum is σ = 1168987680. Its totient is φ = 166133760.

The previous prime is 458878619. The next prime is 458878643. The reversal of 458878640 is 46878854.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (458878643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225146 + ... + 227174.

It is an arithmetic number, because the mean of its divisors is an integer number (14612346).

Almost surely, 2^458878640 is an apocalyptic number.

458878640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 458878640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584493840).

458878640 is an abundant number, since it is smaller than the sum of its proper divisors (710109040).

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

458878640 is a wasteful number, since it uses less digits than its factorization.

458878640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310 (or 2304 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 50.

The square root of 458878640 is about 21421.4527985382. The cubic root of 458878640 is about 771.3164862955.

The spelling of 458878640 in words is "four hundred fifty-eight million, eight hundred seventy-eight thousand, six hundred forty".