28020346 has 8 divisors (see below), whose sum is σ = 42053940. Its totient is φ = 14002368.

The previous prime is 28020341. The next prime is 28020361. The reversal of 28020346 is 64302082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27678121 + 342225 = 5261^2 + 585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28020346.

It is not an unprimeable number, because it can be changed into a prime (28020341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3090 + ... + 8098.

Almost surely, 2^28020346 is an apocalyptic number.

28020346 is a deficient number, since it is larger than the sum of its proper divisors (14033594).

28020346 is a wasteful number, since it uses less digits than its factorization.

28020346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7808.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 28020346 is about 5293.4247893023. The cubic root of 28020346 is about 303.7324299027.

The spelling of 28020346 in words is "twenty-eight million, twenty thousand, three hundred forty-six".