7490391 has 8 divisors (see below), whose sum is σ = 10257264. Its totient is φ = 4858560.

The previous prime is 7490377. The next prime is 7490401. The reversal of 7490391 is 1930947.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-7490391 is a prime.

It is a super-2 number, since 2×7490391² = 112211914665762, which contains 22 as substring.

7490391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7490191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33630 + ... + 33851.

It is an arithmetic number, because the mean of its divisors is an integer number (1282158).

Almost surely, 2^7490391 is an apocalyptic number.

7490391 is a deficient number, since it is larger than the sum of its proper divisors (2766873).

7490391 is a wasteful number, since it uses less digits than its factorization.

7490391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67521.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 7490391 is about 2736.8578698939. The cubic root of 7490391 is about 195.6597508585.

The spelling of 7490391 in words is "seven million, four hundred ninety thousand, three hundred ninety-one".