1219440 has 40 divisors (see below), whose sum is σ = 3781008. Its totient is φ = 325120.

The previous prime is 1219433. The next prime is 1219453. The reversal of 1219440 is 449121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301 + ... + 2780.

2^1219440 is an apocalyptic number.

1219440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1219440 is an abundant number, since it is smaller than the sum of its proper divisors (2561568).

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

1219440 is a wasteful number, since it uses less digits than its factorization.

1219440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097 (or 5091 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1219440 is about 1104.2825725330. The cubic root of 1219440 is about 106.8366214240.

The spelling of 1219440 in words is "one million, two hundred nineteen thousand, four hundred forty".