1642816 has 56 divisors (see below), whose sum is σ = 3942080. Its totient is φ = 663552.

The previous prime is 1642813. The next prime is 1642831. The reversal of 1642816 is 6182461.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8416 + ... + 8608.

2^1642816 is an apocalyptic number.

1642816 is a gapful number since it is divisible by the number (16) 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 1642816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1971040).

1642816 is an abundant number, since it is smaller than the sum of its proper divisors (2299264).

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

1642816 is a wasteful number, since it uses less digits than its factorization.

1642816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 221 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 1642816 is about 1281.7238392103. The cubic root of 1642816 is about 117.9948288455.

The spelling of 1642816 in words is "one million, six hundred forty-two thousand, eight hundred sixteen".