1897280 has 126 divisors (see below), whose sum is σ = 5776722. Its totient is φ = 591360.

The previous prime is 1897279. The next prime is 1897327. The reversal of 1897280 is 827981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1517824 + 379456 = 1232^2 + 616^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1897280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 172475 + ... + 172485.

It is an arithmetic number, because the mean of its divisors is an integer number (45847).

2^1897280 is an apocalyptic number.

1897280 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 1897280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2888361).

1897280 is an abundant number, since it is smaller than the sum of its proper divisors (3879442).

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

1897280 is a wasteful number, since it uses less digits than its factorization.

1897280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53 (or 25 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1897280 is about 1377.4178741399. The cubic root of 1897280 is about 123.7971014117.

The spelling of 1897280 in words is "one million, eight hundred ninety-seven thousand, two hundred eighty".