1463640 has 32 divisors (see below), whose sum is σ = 4391280. Its totient is φ = 390272.

The previous prime is 1463621. The next prime is 1463641. The reversal of 1463640 is 463641.

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 1463640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1463641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5979 + ... + 6218.

2^1463640 is an apocalyptic number.

1463640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1463640 is an abundant number, since it is smaller than the sum of its proper divisors (2927640).

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

1463640 is a wasteful number, since it uses less digits than its factorization.

1463640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12211 (or 12207 counting only the distinct ones).

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

The square root of 1463640 is about 1209.8099024227. The cubic root of 1463640 is about 113.5389194222.

Subtracting from 1463640 its reverse (463641), we obtain a palindrome (999999).

The spelling of 1463640 in words is "one million, four hundred sixty-three thousand, six hundred forty".