1662400 has 42 divisors (see below), whose sum is σ = 4094480. Its totient is φ = 664320.

The previous prime is 1662389. The next prime is 1662403. The reversal of 1662400 is 42661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1081 + ... + 2119.

2^1662400 is an apocalyptic number.

1662400 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 1662400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2047240).

1662400 is an abundant number, since it is smaller than the sum of its proper divisors (2432080).

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

1662400 is a wasteful number, since it uses less digits than its factorization.

1662400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061 (or 1046 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1662400 is about 1289.3409169029. The cubic root of 1662400 is about 118.4618498377.

The spelling of 1662400 in words is "one million, six hundred sixty-two thousand, four hundred".