1945904 has 40 divisors (see below), whose sum is σ = 4099440. Its totient is φ = 891648.

The previous prime is 1945903. The next prime is 1945913. The reversal of 1945904 is 4095491.

It is not an unprimeable number, because it can be changed into a prime (1945903) 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, 11162 + ... + 11334.

It is an arithmetic number, because the mean of its divisors is an integer number (102486).

2^1945904 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 1945904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2049720).

1945904 is an abundant number, since it is smaller than the sum of its proper divisors (2153536).

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

1945904 is a wasteful number, since it uses less digits than its factorization.

1945904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1945904 is about 1394.9566301502. The cubic root of 1945904 is about 124.8457617628.

The spelling of 1945904 in words is "one million, nine hundred forty-five thousand, nine hundred four".