490623391 has 4 divisors (see below), whose sum is σ = 506449984. Its totient is φ = 474796800.

The previous prime is 490623389. The next prime is 490623433. The reversal of 490623391 is 193326094.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 490623391 - 2¹ = 490623389 is a prime.

It is a super-2 number, since 2×490623391² = 481422623592677762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 490623391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490623361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7913250 + ... + 7913311.

It is an arithmetic number, because the mean of its divisors is an integer number (126612496).

Almost surely, 2^490623391 is an apocalyptic number.

490623391 is a deficient number, since it is larger than the sum of its proper divisors (15826593).

490623391 is a wasteful number, since it uses less digits than its factorization.

490623391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15826592.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 490623391 is about 22150.0201128577. The cubic root of 490623391 is about 788.7077045307.

The spelling of 490623391 in words is "four hundred ninety million, six hundred twenty-three thousand, three hundred ninety-one".