28690468 has 6 divisors (see below), whose sum is σ = 50208326. Its totient is φ = 14345232.

The previous prime is 28690463. The next prime is 28690471. The reversal of 28690468 is 86409682.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25725184 + 2965284 = 5072^2 + 1722^2 .

It is not an unprimeable number, because it can be changed into a prime (28690463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3586305 + ... + 3586312.

Almost surely, 2^28690468 is an apocalyptic number.

It is an amenable number.

28690468 is a deficient number, since it is larger than the sum of its proper divisors (21517858).

28690468 is a wasteful number, since it uses less digits than its factorization.

28690468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7172621 (or 7172619 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 28690468 is about 5356.3483829938. The cubic root of 28690468 is about 306.1346894495.

The spelling of 28690468 in words is "twenty-eight million, six hundred ninety thousand, four hundred sixty-eight".