1364640 has 48 divisors (see below), whose sum is σ = 4300128. Its totient is φ = 363776.

The previous prime is 1364633. The next prime is 1364663. The reversal of 1364640 is 464631.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1364640.

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, 942 + ... + 1901.

It is an arithmetic number, because the mean of its divisors is an integer number (89586).

2^1364640 is an apocalyptic number.

1364640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1364640 is an abundant number, since it is smaller than the sum of its proper divisors (2935488).

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

1364640 is a wasteful number, since it uses less digits than its factorization.

1364640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861 (or 2853 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1364640 is about 1168.1780686180. The cubic root of 1364640 is about 110.9190221820.

Subtracting from 1364640 its reverse (464631), we obtain a palindrome (900009).

The spelling of 1364640 in words is "one million, three hundred sixty-four thousand, six hundred forty".