491839425 has 96 divisors (see below), whose sum is σ = 1126594560. Its totient is φ = 204379200.

The previous prime is 491839423. The next prime is 491839433. The reversal of 491839425 is 524938194.

491839425 is a `hidden beast` number, since 49 + 183 + 9 + 425 = 666.

It is not a de Polignac number, because 491839425 - 2¹ = 491839423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (491839423) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 47244 + ... + 56706.

It is an arithmetic number, because the mean of its divisors is an integer number (11735360).

Almost surely, 2^491839425 is an apocalyptic number.

491839425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

491839425 is an abundant number, since it is smaller than the sum of its proper divisors (634755135).

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

491839425 is a wasteful number, since it uses less digits than its factorization.

491839425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9500 (or 9489 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 491839425 is about 22177.4530773937. The cubic root of 491839425 is about 789.3587837518.

The spelling of 491839425 in words is "four hundred ninety-one million, eight hundred thirty-nine thousand, four hundred twenty-five".