1628988 has 48 divisors (see below), whose sum is σ = 4085760. Its totient is φ = 504000.

The previous prime is 1628987. The next prime is 1628989. The reversal of 1628988 is 8898261.

It is an interprime number because it is at equal distance from previous prime (1628987) and next prime (1628989).

Its product of digits (55296) is a multiple of the sum of its prime divisors (216).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10713 + ... + 10863.

It is an arithmetic number, because the mean of its divisors is an integer number (85120).

2^1628988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1628988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2042880).

1628988 is an abundant number, since it is smaller than the sum of its proper divisors (2456772).

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

1628988 is a wasteful number, since it uses less digits than its factorization.

1628988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 216 counting only the distinct ones).

The product of its digits is 55296, while the sum is 42.

The square root of 1628988 is about 1276.3181421574. The cubic root of 1628988 is about 117.6628314343.

The spelling of 1628988 in words is "one million, six hundred twenty-eight thousand, nine hundred eighty-eight".