1493640 has 80 divisors (see below), whose sum is σ = 5031180. Its totient is φ = 397440.

The previous prime is 1493633. The next prime is 1493641. The reversal of 1493640 is 463941.

1493640 is a `hidden beast` number, since 14 + 9 + 3 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1454436 + 39204 = 1206^2 + 198^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1493641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3010 + ... + 3470.

2^1493640 is an apocalyptic number.

1493640 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 1493640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2515590).

1493640 is an abundant number, since it is smaller than the sum of its proper divisors (3537540).

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

1493640 is a wasteful number, since it uses less digits than its factorization.

1493640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1493640 is about 1222.1456541673. The cubic root of 1493640 is about 114.3094087776.

The spelling of 1493640 in words is "one million, four hundred ninety-three thousand, six hundred forty".