491011002 has 12 divisors (see below), whose sum is σ = 1063857210. Its totient is φ = 163670328.

The previous prime is 491010973. The next prime is 491011013. The reversal of 491011002 is 200110194.

It can be written as a sum of positive squares in only one way, i.e., 488454201 + 2556801 = 22101^2 + 1599^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 27278389 = 491011002 / (4 + 9 + 1 + 0 + 1 + 1 + 0 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13639177 + ... + 13639212.

Almost surely, 2^491011002 is an apocalyptic number.

491011002 is an abundant number, since it is smaller than the sum of its proper divisors (572846208).

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

491011002 is a wasteful number, since it uses less digits than its factorization.

491011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27278397 (or 27278394 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 491011002 is about 22158.7680614244. The cubic root of 491011002 is about 788.9153528104.

Adding to 491011002 its reverse (200110194), we get a palindrome (691121196).

The spelling of 491011002 in words is "four hundred ninety-one million, eleven thousand, two".