28476390 has 16 divisors (see below), whose sum is σ = 68343408. Its totient is φ = 7593696.

The previous prime is 28476389. The next prime is 28476391. The reversal of 28476390 is 9367482.

It is an interprime number because it is at equal distance from previous prime (28476389) and next prime (28476391).

It is a super-4 number, since 4×28476390⁴ (a number of 31 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28476391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474577 + ... + 474636.

It is an arithmetic number, because the mean of its divisors is an integer number (4271463).

Almost surely, 2^28476390 is an apocalyptic number.

28476390 is an abundant number, since it is smaller than the sum of its proper divisors (39867018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28476390 is a wasteful number, since it uses less digits than its factorization.

28476390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949223.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 28476390 is about 5336.3273887572. The cubic root of 28476390 is about 305.3713652572.

The spelling of 28476390 in words is "twenty-eight million, four hundred seventy-six thousand, three hundred ninety".