491690360 has 128 divisors (see below), whose sum is σ = 1377216000. Its totient is φ = 154151424.

The previous prime is 491690323. The next prime is 491690377. The reversal of 491690360 is 63096194.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152687 + ... + 155873.

It is an arithmetic number, because the mean of its divisors is an integer number (10759500).

Almost surely, 2^491690360 is an apocalyptic number.

491690360 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491690360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688608000).

491690360 is an abundant number, since it is smaller than the sum of its proper divisors (885525640).

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

491690360 is a wasteful number, since it uses less digits than its factorization.

491690360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253 (or 3249 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 491690360 is about 22174.0920896437. The cubic root of 491690360 is about 789.2790303131.

The spelling of 491690360 in words is "four hundred ninety-one million, six hundred ninety thousand, three hundred sixty".