493990 has 16 divisors (see below), whose sum is σ = 1016352. Its totient is φ = 169344.

The previous prime is 493979. The next prime is 493993. The reversal of 493990 is 99394.

It is a super-2 number, since 2×493990² = 488052240200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493993) by changing a digit.

493990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3459 + ... + 3598.

It is an arithmetic number, because the mean of its divisors is an integer number (63522).

2⁴⁹³⁹⁹⁰ is an apocalyptic number.

493990 is an abundant number, since it is smaller than the sum of its proper divisors (522362).

It is a weird number, because it is abundant, but not a pseudoperfect number.

493990 is a wasteful number, since it uses less digits than its factorization.

493990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7071.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 493990 is about 702.8442217163. The cubic root of 493990 is about 79.0507605196.

The spelling of 493990 in words is "four hundred ninety-three thousand, nine hundred ninety".