7271890 has 8 divisors (see below), whose sum is σ = 13089420. Its totient is φ = 2908752.

The previous prime is 7271881. The next prime is 7271897. The reversal of 7271890 is 981727.

It can be written as a sum of positive squares in 2 ways, for example, as 7080921 + 190969 = 2661^2 + 437^2 .

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

It is not an unprimeable number, because it can be changed into a prime (7271897) 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, 363585 + ... + 363604.

Almost surely, 2^7271890 is an apocalyptic number.

7271890 is a deficient number, since it is larger than the sum of its proper divisors (5817530).

7271890 is a wasteful number, since it uses less digits than its factorization.

7271890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727196.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 7271890 is about 2696.6442108665. The cubic root of 7271890 is about 193.7384259475.

The spelling of 7271890 in words is "seven million, two hundred seventy-one thousand, eight hundred ninety".