1404688 has 10 divisors (see below), whose sum is σ = 2721614. Its totient is φ = 702336.

The previous prime is 1404671. The next prime is 1404709. The reversal of 1404688 is 8864041.

It can be written as a sum of positive squares in only one way, i.e., 719104 + 685584 = 848^2 + 828^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43881 + ... + 43912.

2^1404688 is an apocalyptic number.

It is an amenable number.

1404688 is a deficient number, since it is larger than the sum of its proper divisors (1316926).

1404688 is an equidigital number, since it uses as much as digits as its factorization.

1404688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87801 (or 87795 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 1404688 is about 1185.1953425491. The cubic root of 1404688 is about 111.9936220858.

The spelling of 1404688 in words is "one million, four hundred four thousand, six hundred eighty-eight".