492740391 has 32 divisors (see below), whose sum is σ = 773337600. Its totient is φ = 275126400.

The previous prime is 492740383. The next prime is 492740399. The reversal of 492740391 is 193047294.

It is an interprime number because it is at equal distance from previous prime (492740383) and next prime (492740399).

It is not a de Polignac number, because 492740391 - 2³ = 492740383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (492740399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351510 + ... + 352908.

It is an arithmetic number, because the mean of its divisors is an integer number (24166800).

Almost surely, 2^492740391 is an apocalyptic number.

492740391 is a deficient number, since it is larger than the sum of its proper divisors (280597209).

492740391 is a wasteful number, since it uses less digits than its factorization.

492740391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 492740391 is about 22197.7564406856. The cubic root of 492740391 is about 789.8404799955.

The spelling of 492740391 in words is "four hundred ninety-two million, seven hundred forty thousand, three hundred ninety-one".