28672394 has 16 divisors (see below), whose sum is σ = 43637832. Its totient is φ = 14128128.

The previous prime is 28672393. The next prime is 28672411. The reversal of 28672394 is 49327682.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17749369 + 10923025 = 4213^2 + 3305^2 .

It is not an unprimeable number, because it can be changed into a prime (28672393) 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 in 7 ways as a sum of consecutive naturals, for example, 66002 + ... + 66434.

Almost surely, 2^28672394 is an apocalyptic number.

28672394 is a deficient number, since it is larger than the sum of its proper divisors (14965438).

28672394 is a wasteful number, since it uses less digits than its factorization.

28672394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

The product of its digits is 145152, while the sum is 41.

The square root of 28672394 is about 5354.6609603223. The cubic root of 28672394 is about 306.0703911994.

The spelling of 28672394 in words is "twenty-eight million, six hundred seventy-two thousand, three hundred ninety-four".