1491834240 has 512 divisors, whose sum is σ = 5911920000. Its totient is φ = 353009664.

The previous prime is 1491834221. The next prime is 1491834251. The reversal of 1491834240 is 424381941.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1491834195 and 1491834204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6514446 + ... + 6514674.

Almost surely, 2^1491834240 is an apocalyptic number.

1491834240 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 1491834240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2955960000).

1491834240 is an abundant number, since it is smaller than the sum of its proper divisors (4420085760).

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

1491834240 is a wasteful number, since it uses less digits than its factorization.

1491834240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1491834240 is about 38624.2700901907. The cubic root of 1491834240 is about 1142.6332480449.

The spelling of 1491834240 in words is "one billion, four hundred ninety-one million, eight hundred thirty-four thousand, two hundred forty".