1363640 has 32 divisors (see below), whose sum is σ = 3116880. Its totient is φ = 536832.

The previous prime is 1363631. The next prime is 1363673. The reversal of 1363640 is 463631.

1363640 = 89² + 90² + ... + 168².

It is an Ulam number.

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, 2687 + ... + 3153.

2^1363640 is an apocalyptic number.

1363640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1363640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1558440).

1363640 is an abundant number, since it is smaller than the sum of its proper divisors (1753240).

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

1363640 is a wasteful number, since it uses less digits than its factorization.

1363640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1363640 is about 1167.7499732391. The cubic root of 1363640 is about 110.8919219635.

Subtracting from 1363640 its reverse (463631), we obtain a palindrome (900009).

The spelling of 1363640 in words is "one million, three hundred sixty-three thousand, six hundred forty".