1402638 has 16 divisors (see below), whose sum is σ = 2825040. Its totient is φ = 464256.

The previous prime is 1402603. The next prime is 1402673. The reversal of 1402638 is 8362041.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1402603) and next prime (1402673).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198 + ... + 1686.

It is an arithmetic number, because the mean of its divisors is an integer number (176565).

2^1402638 is an apocalyptic number.

1402638 is an abundant number, since it is smaller than the sum of its proper divisors (1422402).

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

1402638 is a wasteful number, since it uses less digits than its factorization.

1402638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1402638 is about 1184.3301904452. The cubic root of 1402638 is about 111.9391144413.

Adding to 1402638 its reverse (8362041), we get a palindrome (9764679).

The spelling of 1402638 in words is "one million, four hundred two thousand, six hundred thirty-eight".