491658174 has 120 divisors (see below), whose sum is σ = 1329921648. Its totient is φ = 132969600.

The previous prime is 491658149. The next prime is 491658229. The reversal of 491658174 is 471856194.

It is a super-2 number, since 2×491658174² = 483455520122028552, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

Its product of digits (241920) is a multiple of the sum of its prime factors (1260).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 408774 + ... + 409974.

Almost surely, 2^491658174 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491658174, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (664960824).

491658174 is an abundant number, since it is smaller than the sum of its proper divisors (838263474).

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

491658174 is a wasteful number, since it uses less digits than its factorization.

491658174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260 (or 1232 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 491658174 is about 22173.3663208815. The cubic root of 491658174 is about 789.2618078961.

The spelling of 491658174 in words is "four hundred ninety-one million, six hundred fifty-eight thousand, one hundred seventy-four".