491202972 has 144 divisors (see below), whose sum is σ = 1446550560. Its totient is φ = 139221504.

The previous prime is 491202937. The next prime is 491202979. The reversal of 491202972 is 279202194.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491202979) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 328258 + ... + 329750.

It is an arithmetic number, because the mean of its divisors is an integer number (10045490).

Almost surely, 2^491202972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491202972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (723275280).

491202972 is an abundant number, since it is smaller than the sum of its proper divisors (955347588).

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

491202972 is a wasteful number, since it uses less digits than its factorization.

491202972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 1567 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 491202972 is about 22163.0993319978. The cubic root of 491202972 is about 789.0181531868.

It can be divided in two parts, 49 and 1202972, that added together give a palindrome (1203021).

The spelling of 491202972 in words is "four hundred ninety-one million, two hundred two thousand, nine hundred seventy-two".