1904400 has 135 divisors (see below), whose sum is σ = 6908629. Its totient is φ = 485760.

The previous prime is 1904311. The next prime is 1904407. The reversal of 1904400 is 44091.

The square root of 1904400 is 1380.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 685584 + 1218816 = 828^2 + 1104^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1904407) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 82789 + ... + 82811.

2^1904400 is an apocalyptic number.

1904400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1904400 is the 1380-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1904400

1904400 is an abundant number, since it is smaller than the sum of its proper divisors (5004229).

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

1904400 is a wasteful number, since it uses less digits than its factorization.

1904400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The cubic root of 1904400 is about 123.9517675751.

Multiplying 1904400 by its product of nonzero digits (144), we get a square (274233600 = 16560²).

1904400 divided by its product of nonzero digits (144) gives a square (13225 = 115²).

Adding to 1904400 its reverse (44091), we get a palindrome (1948491).

It can be divided in two parts, 1904 and 400, that added together give a square (2304 = 48²).

The spelling of 1904400 in words is "one million, nine hundred four thousand, four hundred".