1027440 has 60 divisors (see below), whose sum is σ = 3452904. Its totient is φ = 273792.

The previous prime is 1027427. The next prime is 1027459. The reversal of 1027440 is 447201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7 + ... + 1433.

2^1027440 is an apocalyptic number.

1027440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1027440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1726452).

1027440 is an abundant number, since it is smaller than the sum of its proper divisors (2425464).

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

1027440 is a wasteful number, since it uses less digits than its factorization.

1027440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1027440 is about 1013.6271503862. The cubic root of 1027440 is about 100.9064257658.

The spelling of 1027440 in words is "one million, twenty-seven thousand, four hundred forty".