28642710 has 16 divisors (see below), whose sum is σ = 68742576. Its totient is φ = 7638048.

The previous prime is 28642703. The next prime is 28642711. The reversal of 28642710 is 1724682.

It is a super-2 number, since 2×28642710² = 1640809672288200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 954757 = 28642710 / (2 + 8 + 6 + 4 + 2 + 7 + 1 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28642711) 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, 477349 + ... + 477408.

It is an arithmetic number, because the mean of its divisors is an integer number (4296411).

Almost surely, 2^28642710 is an apocalyptic number.

28642710 is an abundant number, since it is smaller than the sum of its proper divisors (40099866).

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

28642710 is a wasteful number, since it uses less digits than its factorization.

28642710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954767.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28642710 is about 5351.8884517523. Note that the first 3 decimals coincide. The cubic root of 28642710 is about 305.9647317207.

The spelling of 28642710 in words is "twenty-eight million, six hundred forty-two thousand, seven hundred ten".