1628097520 has 80 divisors (see below), whose sum is σ = 4414449600. Its totient is φ = 558195456.

The previous prime is 1628097487. The next prime is 1628097563. The reversal of 1628097520 is 257908261.

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

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2227 + ... + 57106.

It is an arithmetic number, because the mean of its divisors is an integer number (55180620).

Almost surely, 2^1628097520 is an apocalyptic number.

1628097520 is a gapful number since it is divisible by the number (10) 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 1628097520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2207224800).

1628097520 is an abundant number, since it is smaller than the sum of its proper divisors (2786352080).

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

1628097520 is an equidigital number, since it uses as much as digits as its factorization.

1628097520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59367 (or 59347 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1628097520 is about 40349.6904573009. The cubic root of 1628097520 is about 1176.4138754897.

The spelling of 1628097520 in words is "one billion, six hundred twenty-eight million, ninety-seven thousand, five hundred twenty".