491451902 has 32 divisors (see below), whose sum is σ = 790428672. Its totient is φ = 228612384.

The previous prime is 491451899. The next prime is 491451907. The reversal of 491451902 is 209154194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491451907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 725588 + ... + 726264.

It is an arithmetic number, because the mean of its divisors is an integer number (24700896).

Almost surely, 2^491451902 is an apocalyptic number.

491451902 is a deficient number, since it is larger than the sum of its proper divisors (298976770).

491451902 is a wasteful number, since it uses less digits than its factorization.

491451902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 491451902 is about 22168.7144868619. The cubic root of 491451902 is about 789.1514158981.

The spelling of 491451902 in words is "four hundred ninety-one million, four hundred fifty-one thousand, nine hundred two".