1918449 has 24 divisors (see below), whose sum is σ = 3144960. Its totient is φ = 1117152.

The previous prime is 1918439. The next prime is 1918451. The reversal of 1918449 is 9448191.

It is not a de Polignac number, because 1918449 - 2⁵ = 1918417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1918429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1792 + ... + 2654.

It is an arithmetic number, because the mean of its divisors is an integer number (131040).

2^1918449 is an apocalyptic number.

1918449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1918449 is a deficient number, since it is larger than the sum of its proper divisors (1226511).

1918449 is a wasteful number, since it uses less digits than its factorization.

1918449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 898 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1918449 is about 1385.0808640653. The cubic root of 1918449 is about 124.2558237388.

Subtracting from 1918449 its product of digits (10368), we obtain a triangular number (1908081 = T₁₉₅₃).

It can be divided in two parts, 191844 and 9, that multiplied together give a square (1726596 = 1314²).

The spelling of 1918449 in words is "one million, nine hundred eighteen thousand, four hundred forty-nine".