1913404 has 6 divisors (see below), whose sum is σ = 3348464. Its totient is φ = 956700.

The previous prime is 1913389. The next prime is 1913407. The reversal of 1913404 is 4043191.

It is a super-2 number, since 2×1913404² = 7322229734432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239172 + ... + 239179.

2^1913404 is an apocalyptic number.

It is an amenable number.

1913404 is a deficient number, since it is larger than the sum of its proper divisors (1435060).

1913404 is a wasteful number, since it uses less digits than its factorization.

1913404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478355 (or 478353 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1913404 is about 1383.2584718700. The cubic root of 1913404 is about 124.1468084293.

Adding to 1913404 its reverse (4043191), we get a palindrome (5956595).

The spelling of 1913404 in words is "one million, nine hundred thirteen thousand, four hundred four".