491172048 has 30 divisors (see below), whose sum is σ = 1374599954. Its totient is φ = 163723968.

The previous prime is 491172047. The next prime is 491172127. The reversal of 491172048 is 840271194.

It can be written as a sum of positive squares in only one way, i.e., 285880464 + 205291584 = 16908^2 + 14328^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491172047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1705315 + ... + 1705602.

Almost surely, 2^491172048 is an apocalyptic number.

491172048 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

491172048 is an abundant number, since it is smaller than the sum of its proper divisors (883427906).

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

491172048 is a wasteful number, since it uses less digits than its factorization.

491172048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410931 (or 3410922 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 491172048 is about 22162.4016749088. The cubic root of 491172048 is about 789.0015951237.

The spelling of 491172048 in words is "four hundred ninety-one million, one hundred seventy-two thousand, forty-eight".