1897480 has 64 divisors (see below), whose sum is σ = 4762800. Its totient is φ = 675840.

The previous prime is 1897459. The next prime is 1897481. The reversal of 1897480 is 847981.

It can be written as a sum of positive squares in 8 ways, for example, as 9604 + 1887876 = 98^2 + 1374^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1897481) 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, 21276 + ... + 21364.

2^1897480 is an apocalyptic number.

1897480 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 1897480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2381400).

1897480 is an abundant number, since it is smaller than the sum of its proper divisors (2865320).

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

1897480 is a wasteful number, since it uses less digits than its factorization.

1897480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1897480 is about 1377.4904718364. The cubic root of 1897480 is about 123.8014512441.

The spelling of 1897480 in words is "one million, eight hundred ninety-seven thousand, four hundred eighty".