1485840 has 80 divisors (see below), whose sum is σ = 4749696. Its totient is φ = 384000.

The previous prime is 1485821. The next prime is 1485853. The reversal of 1485840 is 485841.

1485840 = 170² + 171² + ... + 210².

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1485798 and 1485807.

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, 9765 + ... + 9915.

2^1485840 is an apocalyptic number.

1485840 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 1485840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2374848).

1485840 is an abundant number, since it is smaller than the sum of its proper divisors (3263856).

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

1485840 is a wasteful number, since it uses less digits than its factorization.

1485840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 1485840 is about 1218.9503681447. The cubic root of 1485840 is about 114.1100814183.

Subtracting from 1485840 its reverse (485841), we obtain a palindrome (999999).

The spelling of 1485840 in words is "one million, four hundred eighty-five thousand, eight hundred forty".