491692390 has 64 divisors (see below), whose sum is σ = 1091957760. Its totient is φ = 155675520.

The previous prime is 491692379. The next prime is 491692417. The reversal of 491692390 is 93296194.

It is a super-2 number, since 2×491692390² = 483522812767824200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41425 + ... + 51955.

It is an arithmetic number, because the mean of its divisors is an integer number (17061840).

Almost surely, 2^491692390 is an apocalyptic number.

491692390 is an abundant number, since it is smaller than the sum of its proper divisors (600265370).

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

491692390 is a wasteful number, since it uses less digits than its factorization.

491692390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10597.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 491692390 is about 22174.1378637367. The cubic root of 491692390 is about 789.2801165212.

The spelling of 491692390 in words is "four hundred ninety-one million, six hundred ninety-two thousand, three hundred ninety".