1491340800 has 240 divisors, whose sum is σ = 5005072512. Its totient is φ = 391372800.

The previous prime is 1491340787. The next prime is 1491340801. The reversal of 1491340800 is 80431941.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491340801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2726127 + ... + 2726673.

Almost surely, 2^1491340800 is an apocalyptic number.

1491340800 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 1491340800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2502536256).

1491340800 is an abundant number, since it is smaller than the sum of its proper divisors (3513731712).

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

1491340800 is an equidigital number, since it uses as much as digits as its factorization.

1491340800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1491340800 is about 38617.8818683780. The cubic root of 1491340800 is about 1142.5072547967.

The spelling of 1491340800 in words is "one billion, four hundred ninety-one million, three hundred forty thousand, eight hundred".