1988380 has 24 divisors (see below), whose sum is σ = 4290048. Its totient is φ = 773568.

The previous prime is 1988353. The next prime is 1988411. The reversal of 1988380 is 838891.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an Ulam number.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604 + ... + 2083.

It is an arithmetic number, because the mean of its divisors is an integer number (178752).

2^1988380 is an apocalyptic number.

1988380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1988380 is an abundant number, since it is smaller than the sum of its proper divisors (2301668).

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

1988380 is a wasteful number, since it uses less digits than its factorization.

1988380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733 (or 2731 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1988380 is about 1410.0992872844. The cubic root of 1988380 is about 125.7476261925.

The spelling of 1988380 in words is "one million, nine hundred eighty-eight thousand, three hundred eighty".