491553396 has 36 divisors (see below), whose sum is σ = 1252034784. Its totient is φ = 162598800.

The previous prime is 491553379. The next prime is 491553421. The reversal of 491553396 is 693355194.

491553396 is a `hidden beast` number, since 4 + 9 + 1 + 553 + 3 + 96 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×491553396² = 483249482238265632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 47400 + ... + 56831.

It is an arithmetic number, because the mean of its divisors is an integer number (34778744).

Almost surely, 2^491553396 is an apocalyptic number.

It is an amenable number.

491553396 is an abundant number, since it is smaller than the sum of its proper divisors (760481388).

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

491553396 is a wasteful number, since it uses less digits than its factorization.

491553396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104372 (or 104367 counting only the distinct ones).

The product of its digits is 437400, while the sum is 45.

The square root of 491553396 is about 22171.0034955570. The cubic root of 491553396 is about 789.2057369961.

It can be divided in two parts, 4915 and 53396, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 491553396 in words is "four hundred ninety-one million, five hundred fifty-three thousand, three hundred ninety-six".