28407802 has 4 divisors (see below), whose sum is σ = 42611706. Its totient is φ = 14203900.

The previous prime is 28407763. The next prime is 28407839. The reversal of 28407802 is 20870482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20870482 = 2 ⋅10435241.

It can be written as a sum of positive squares in only one way, i.e., 27973521 + 434281 = 5289^2 + 659^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7101949 + ... + 7101952.

Almost surely, 2^28407802 is an apocalyptic number.

28407802 is a deficient number, since it is larger than the sum of its proper divisors (14203904).

28407802 is a wasteful number, since it uses less digits than its factorization.

28407802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14203903.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 28407802 is about 5329.8969971286. The cubic root of 28407802 is about 305.1259964965.

The spelling of 28407802 in words is "twenty-eight million, four hundred seven thousand, eight hundred two".