28398002 has 4 divisors (see below), whose sum is σ = 42597006. Its totient is φ = 14199000.

The previous prime is 28397987. The next prime is 28398037. The reversal of 28398002 is 20089382.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 28185481 + 212521 = 5309^2 + 461^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28398002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7099499 + ... + 7099502.

Almost surely, 2^28398002 is an apocalyptic number.

28398002 is a deficient number, since it is larger than the sum of its proper divisors (14199004).

28398002 is a wasteful number, since it uses less digits than its factorization.

28398002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14199003.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 28398002 is about 5328.9775754829. The cubic root of 28398002 is about 305.0909054479.

The spelling of 28398002 in words is "twenty-eight million, three hundred ninety-eight thousand, two".