491551434 has 24 divisors (see below), whose sum is σ = 1161849312. Its totient is φ = 148954920.

The previous prime is 491551429. The next prime is 491551483. The reversal of 491551434 is 434155194.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1241094 + ... + 1241489.

It is an arithmetic number, because the mean of its divisors is an integer number (48410388).

Almost surely, 2^491551434 is an apocalyptic number.

491551434 is an abundant number, since it is smaller than the sum of its proper divisors (670297878).

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

491551434 is a wasteful number, since it uses less digits than its factorization.

491551434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482602 (or 2482599 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 491551434 is about 22170.9592485305. The cubic root of 491551434 is about 789.2046869754.

The spelling of 491551434 in words is "four hundred ninety-one million, five hundred fifty-one thousand, four hundred thirty-four".