489145720 has 32 divisors (see below), whose sum is σ = 1257804000. Its totient is φ = 167707008.

The previous prime is 489145711. The next prime is 489145721. The reversal of 489145720 is 27541984.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489145721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 873195 + ... + 873754.

It is an arithmetic number, because the mean of its divisors is an integer number (39306375).

Almost surely, 2^489145720 is an apocalyptic number.

489145720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

489145720 is an abundant number, since it is smaller than the sum of its proper divisors (768658280).

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

489145720 is a wasteful number, since it uses less digits than its factorization.

489145720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746967 (or 1746963 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 489145720 is about 22116.6389851623. The cubic root of 489145720 is about 787.9150921595.

The spelling of 489145720 in words is "four hundred eighty-nine million, one hundred forty-five thousand, seven hundred twenty".