1408720 has 20 divisors (see below), whose sum is σ = 3275460. Its totient is φ = 563456.

The previous prime is 1408709. The next prime is 1408741. The reversal of 1408720 is 278041.

It can be written as a sum of positive squares in 2 ways, for example, as 781456 + 627264 = 884^2 + 792^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1408691 and 1408700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8725 + ... + 8884.

It is an arithmetic number, because the mean of its divisors is an integer number (163773).

2^1408720 is an apocalyptic number.

1408720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1408720 is an abundant number, since it is smaller than the sum of its proper divisors (1866740).

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

1408720 is a wasteful number, since it uses less digits than its factorization.

1408720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17622 (or 17616 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1408720 is about 1186.8951090977. The cubic root of 1408720 is about 112.1006747843.

The spelling of 1408720 in words is "one million, four hundred eight thousand, seven hundred twenty".