1402644 has 24 divisors (see below), whose sum is σ = 3296160. Its totient is φ = 464224.

The previous prime is 1402603. The next prime is 1402673. The reversal of 1402644 is 4462041.

It is a self number, because there is not a number n which added to its sum of digits gives 1402644.

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, 1822 + ... + 2474.

It is an arithmetic number, because the mean of its divisors is an integer number (137340).

2^1402644 is an apocalyptic number.

It is an amenable number.

1402644 is an abundant number, since it is smaller than the sum of its proper divisors (1893516).

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

1402644 is a wasteful number, since it uses less digits than its factorization.

1402644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1402644 is about 1184.3327235199. The cubic root of 1402644 is about 111.9392740534.

Adding to 1402644 its reverse (4462041), we get a palindrome (5864685).

The spelling of 1402644 in words is "one million, four hundred two thousand, six hundred forty-four".