491897700 has 108 divisors (see below), whose sum is σ = 1762109440. Its totient is φ = 112432320.

The previous prime is 491897699. The next prime is 491897729. The reversal of 491897700 is 7798194.

491897700 is a `hidden beast` number, since 491 + 8 + 97 + 70 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32740 + ... + 45339.

Almost surely, 2^491897700 is an apocalyptic number.

It is an amenable number.

491897700 is an abundant number, since it is smaller than the sum of its proper divisors (1270211740).

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

491897700 is a wasteful number, since it uses less digits than its factorization.

491897700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78106 (or 78096 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 491897700 is about 22178.7668728448. The cubic root of 491897700 is about 789.3899579279.

The spelling of 491897700 in words is "four hundred ninety-one million, eight hundred ninety-seven thousand, seven hundred".