1401688 has 8 divisors (see below), whose sum is σ = 2628180. Its totient is φ = 700840.

The previous prime is 1401683. The next prime is 1401703. The reversal of 1401688 is 8861041.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87598 + ... + 87613.

2^1401688 is an apocalyptic number.

It is an amenable number.

1401688 is a deficient number, since it is larger than the sum of its proper divisors (1226492).

1401688 is a wasteful number, since it uses less digits than its factorization.

1401688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175217 (or 175213 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1401688 is about 1183.9290519284. The cubic root of 1401688 is about 111.9138367916.

The spelling of 1401688 in words is "one million, four hundred one thousand, six hundred eighty-eight".