1988471220 has 48 divisors (see below), whose sum is σ = 5860760640. Its totient is φ = 502350336.

The previous prime is 1988471209. The next prime is 1988471269. The reversal of 1988471220 is 221748891.

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, 870997 + ... + 873276.

It is an arithmetic number, because the mean of its divisors is an integer number (122099180).

Almost surely, 2^1988471220 is an apocalyptic number.

1988471220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1988471220 is an abundant number, since it is smaller than the sum of its proper divisors (3872289420).

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

1988471220 is a wasteful number, since it uses less digits than its factorization.

1988471220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744304 (or 1744302 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 1988471220 is about 44592.2775825591. The cubic root of 1988471220 is about 1257.4954911851.

The spelling of 1988471220 in words is "one billion, nine hundred eighty-eight million, four hundred seventy-one thousand, two hundred twenty".