1888145220 has 48 divisors (see below), whose sum is σ = 5693486400. Its totient is φ = 464774016.

The previous prime is 1888145201. The next prime is 1888145249. The reversal of 1888145220 is 225418881.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 1209570 + ... + 1211129.

It is an arithmetic number, because the mean of its divisors is an integer number (118614300).

Almost surely, 2^1888145220 is an apocalyptic number.

1888145220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1888145220 is an abundant number, since it is smaller than the sum of its proper divisors (3805341180).

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

1888145220 is a wasteful number, since it uses less digits than its factorization.

1888145220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420724 (or 2420722 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 39.

The square root of 1888145220 is about 43452.7930057436. The cubic root of 1888145220 is about 1235.9810090190.

The spelling of 1888145220 in words is "one billion, eight hundred eighty-eight million, one hundred forty-five thousand, two hundred twenty".