402272291 has 4 divisors (see below), whose sum is σ = 403306800. Its totient is φ = 401237784.

The previous prime is 402272287. The next prime is 402272293. The reversal of 402272291 is 192272204.

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

It is a cyclic number.

It is not a de Polignac number, because 402272291 - 2² = 402272287 is a prime.

It is a super-2 number, since 2×402272291² = 323645992212777362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402272293) 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, 516671 + ... + 517448.

It is an arithmetic number, because the mean of its divisors is an integer number (100826700).

Almost surely, 2^402272291 is an apocalyptic number.

402272291 is a deficient number, since it is larger than the sum of its proper divisors (1034509).

402272291 is a wasteful number, since it uses less digits than its factorization.

402272291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034508.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 402272291 is about 20056.7268266784. The cubic root of 402272291 is about 738.1988647231.

The spelling of 402272291 in words is "four hundred two million, two hundred seventy-two thousand, two hundred ninety-one".