2053778004 has 60 divisors (see below), whose sum is σ = 5384490804. Its totient is φ = 682615296.

The previous prime is 2053778003. The next prime is 2053778017. The reversal of 2053778004 is 4008773502.

2053778004 is a `hidden beast` number, since 205 + 377 + 80 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1669539600 + 384238404 = 40860^2 + 19602^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2053778004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2053778003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 105394 + ... + 123350.

Almost surely, 2^2053778004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2053778004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2692245402).

2053778004 is an abundant number, since it is smaller than the sum of its proper divisors (3330712800).

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

2053778004 is a wasteful number, since it uses less digits than its factorization.

2053778004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18326 (or 18315 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 2053778004 is about 45318.6275608607. The cubic root of 2053778004 is about 1271.1139922889.

The spelling of 2053778004 in words is "two billion, fifty-three million, seven hundred seventy-eight thousand, four".