3780644 has 18 divisors (see below), whose sum is σ = 7696710. Its totient is φ = 1620192.

The previous prime is 3780619. The next prime is 3780653. The reversal of 3780644 is 4460873.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3467044 + 313600 = 1862^2 + 560^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3780644.

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, 9449 + ... + 9840.

It is an arithmetic number, because the mean of its divisors is an integer number (427595).

Almost surely, 2^3780644 is an apocalyptic number.

It is an amenable number.

3780644 is an abundant number, since it is smaller than the sum of its proper divisors (3916066).

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

3780644 is a wasteful number, since it uses less digits than its factorization.

3780644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19307 (or 19298 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 3780644 is about 1944.3878213978. The cubic root of 3780644 is about 155.7836690246.

The spelling of 3780644 in words is "three million, seven hundred eighty thousand, six hundred forty-four".