1491547488 has 48 divisors (see below), whose sum is σ = 4050330480. Its totient is φ = 480037376.

The previous prime is 1491547483. The next prime is 1491547489. The reversal of 1491547488 is 8847451941.

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

It is a super-2 number, since 2×1491547488² = 4449427817918220288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1491547488.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491547483) 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, 265095 + ... + 270662.

It is an arithmetic number, because the mean of its divisors is an integer number (84381885).

Almost surely, 2^1491547488 is an apocalyptic number.

It is an amenable number.

1491547488 is an abundant number, since it is smaller than the sum of its proper divisors (2558782992).

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

1491547488 is a wasteful number, since it uses less digits than its factorization.

1491547488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535799 (or 535791 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 51.

The square root of 1491547488 is about 38620.5578416470. The cubic root of 1491547488 is about 1142.5600331716.

The spelling of 1491547488 in words is "one billion, four hundred ninety-one million, five hundred forty-seven thousand, four hundred eighty-eight".