20290288 has 10 divisors (see below), whose sum is σ = 39312464. Its totient is φ = 10145136.

The previous prime is 20290261. The next prime is 20290297. The reversal of 20290288 is 88209202.

It is a super-3 number, since 3×20290288³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 634056 + ... + 634087.

Almost surely, 2^20290288 is an apocalyptic number.

It is an amenable number.

20290288 is a deficient number, since it is larger than the sum of its proper divisors (19022176).

20290288 is a wasteful number, since it uses less digits than its factorization.

20290288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268151 (or 1268145 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 20290288 is about 4504.4742201504. The cubic root of 20290288 is about 272.7487300559.

The spelling of 20290288 in words is "twenty million, two hundred ninety thousand, two hundred eighty-eight".