1402688 has 56 divisors (see below), whose sum is σ = 3316224. Its totient is φ = 576000.

The previous prime is 1402673. The next prime is 1402693. The reversal of 1402688 is 8862041.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 1402688.

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, 13838 + ... + 13938.

2^1402688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1402688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658112).

1402688 is an abundant number, since it is smaller than the sum of its proper divisors (1913536).

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

1402688 is a wasteful number, since it uses less digits than its factorization.

1402688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1402688 is about 1184.3512992352. The cubic root of 1402688 is about 111.9404445277.

The spelling of 1402688 in words is "one million, four hundred two thousand, six hundred eighty-eight".