5491990 has 32 divisors (see below), whose sum is σ = 11476224. Its totient is φ = 1853280.

The previous prime is 5491979. The next prime is 5491999. The reversal of 5491990 is 991945.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5491999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4105 + ... + 5275.

It is an arithmetic number, because the mean of its divisors is an integer number (358632).

Almost surely, 2^5491990 is an apocalyptic number.

5491990 is an abundant number, since it is smaller than the sum of its proper divisors (5984234).

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

5491990 is a wasteful number, since it uses less digits than its factorization.

5491990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 5491990 is about 2343.4995199487. The cubic root of 5491990 is about 176.4316839511.

The spelling of 5491990 in words is "five million, four hundred ninety-one thousand, nine hundred ninety".