290722 has 4 divisors (see below), whose sum is σ = 436086. Its totient is φ = 145360.

The previous prime is 290711. The next prime is 290737. The reversal of 290722 is 227092.

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

It can be written as a sum of positive squares in only one way, i.e., 168921 + 121801 = 411^2 + 349^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 290693 and 290702.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72679 + ... + 72682.

2²⁹⁰⁷²² is an apocalyptic number.

290722 is a deficient number, since it is larger than the sum of its proper divisors (145364).

290722 is a wasteful number, since it uses less digits than its factorization.

290722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145363.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 290722 is about 539.1864241614. The cubic root of 290722 is about 66.2459449280.

The spelling of 290722 in words is "two hundred ninety thousand, seven hundred twenty-two".