491284404 has 72 divisors (see below), whose sum is σ = 1380567552. Its totient is φ = 146283840.

The previous prime is 491284369. The next prime is 491284457. The reversal of 491284404 is 404482194.

It is a super-2 number, since 2×491284404² = 482720731227270432, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2424 + ... + 31439.

Almost surely, 2^491284404 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 491284404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (690283776).

491284404 is an abundant number, since it is smaller than the sum of its proper divisors (889283148).

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

491284404 is a wasteful number, since it uses less digits than its factorization.

491284404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33917 (or 33912 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 491284404 is about 22164.9363635450. The cubic root of 491284404 is about 789.0617521195.

The spelling of 491284404 in words is "four hundred ninety-one million, two hundred eighty-four thousand, four hundred four".