1600000 has 60 divisors (see below), whose sum is σ = 3995838. Its totient is φ = 640000.

The previous prime is 1599977. The next prime is 1600033. The reversal of 1600000 is 61.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 3 ways, for example, as 2304 + 1597696 = 48^2 + 1264^2 .

It is a hoax number, since the sum of its digits (7) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 319998 + ... + 320002.

2^1600000 is an apocalyptic number.

1600000 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 1600000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1997919).

1600000 is an abundant number, since it is smaller than the sum of its proper divisors (2395838).

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

1600000 is an frugal number, since it uses more digits than its factorization.

1600000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43 (or 7 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 1600000 is about 1264.9110640674. The cubic root of 1600000 is about 116.9607095285.

Adding to 1600000 its reverse (61), we get a palindrome (1600061).

The spelling of 1600000 in words is "one million, six hundred thousand".