28627851 has 32 divisors (see below), whose sum is σ = 46312960. Its totient is φ = 15365376.

The previous prime is 28627811. The next prime is 28627871. The reversal of 28627851 is 15872682.

It is not a de Polignac number, because 28627851 - 2¹⁷ = 28496779 is a prime.

It is the 5351-st Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28627811) by changing a digit.

It is a nontrivial repunit in base 5350.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62415 + ... + 62871.

It is an arithmetic number, because the mean of its divisors is an integer number (1447280).

Almost surely, 2^28627851 is an apocalyptic number.

28627851 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28627851 is a deficient number, since it is larger than the sum of its proper divisors (17685109).

28627851 is a wasteful number, since it uses less digits than its factorization.

28627851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643.

The product of its digits is 53760, while the sum is 39.

The square root of 28627851 is about 5350.5000700869. The cubic root of 28627851 is about 305.9118140516.

The spelling of 28627851 in words is "twenty-eight million, six hundred twenty-seven thousand, eight hundred fifty-one".