1874200644 has 18 divisors (see below), whose sum is σ = 4737562830. Its totient is φ = 624733536.

The previous prime is 1874200637. The next prime is 1874200687. The reversal of 1874200644 is 4460024781.

1874200644 is a `hidden beast` number, since 1 + 8 + 7 + 4 + 2 + 0 + 0 + 644 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1592967744 + 281232900 = 39912^2 + 16770^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 52061129 = 1874200644 / (1 + 8 + 7 + 4 + 2 + 0 + 0 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 1874200599 and 1874200608.

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, 26030529 + ... + 26030600.

It is an arithmetic number, because the mean of its divisors is an integer number (263197935).

Almost surely, 2^1874200644 is an apocalyptic number.

It is an amenable number.

1874200644 is an abundant number, since it is smaller than the sum of its proper divisors (2863362186).

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

1874200644 is a wasteful number, since it uses less digits than its factorization.

1874200644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52061139 (or 52061134 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 1874200644 is about 43292.0390372179. The cubic root of 1874200644 is about 1232.9307783533.

The spelling of 1874200644 in words is "one billion, eight hundred seventy-four million, two hundred thousand, six hundred forty-four".