491029490 has 24 divisors (see below), whose sum is σ = 1028156652. Its totient is φ = 168352800.

The previous prime is 491029439. The next prime is 491029493. The reversal of 491029490 is 94920194.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 444830281 + 46199209 = 21091^2 + 6797^2 .

It is a super-2 number, since 2×491029490² = 482219920099320200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (491029493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 500561 + ... + 501540.

Almost surely, 2^491029490 is an apocalyptic number.

491029490 is an abundant number, since it is smaller than the sum of its proper divisors (537127162).

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

491029490 is a wasteful number, since it uses less digits than its factorization.

491029490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002122 (or 1002115 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 491029490 is about 22159.1852287037. The cubic root of 491029490 is about 788.9252543428.

The spelling of 491029490 in words is "four hundred ninety-one million, twenty-nine thousand, four hundred ninety".