2003778 has 96 divisors (see below), whose sum is σ = 5591040. Its totient is φ = 524880.

The previous prime is 2003767. The next prime is 2003801. The reversal of 2003778 is 8773002.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64623 + ... + 64653.

It is an arithmetic number, because the mean of its divisors is an integer number (58240).

2^2003778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2003778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2795520).

2003778 is an abundant number, since it is smaller than the sum of its proper divisors (3587262).

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

2003778 is a wasteful number, since it uses less digits than its factorization.

2003778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 2003778 is about 1415.5486568818. The cubic root of 2003778 is about 126.0713881173.

The spelling of 2003778 in words is "two million, three thousand, seven hundred seventy-eight".