491400528 has 20 divisors (see below), whose sum is σ = 1269451488. Its totient is φ = 163800160.

The previous prime is 491400523. The next prime is 491400541. The reversal of 491400528 is 825004194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491400523) 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 3 ways as a sum of consecutive naturals, for example, 5118708 + ... + 5118803.

Almost surely, 2^491400528 is an apocalyptic number.

491400528 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

491400528 is an abundant number, since it is smaller than the sum of its proper divisors (778050960).

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

491400528 is a wasteful number, since it uses less digits than its factorization.

491400528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10237522 (or 10237516 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 491400528 is about 22167.5557515934. Note that the first 3 decimals coincide. The cubic root of 491400528 is about 789.1239169184.

The spelling of 491400528 in words is "four hundred ninety-one million, four hundred thousand, five hundred twenty-eight".