28810761 has 16 divisors (see below), whose sum is σ = 43981824. Its totient is φ = 16433424.

The previous prime is 28810759. The next prime is 28810787. The reversal of 28810761 is 16701882.

It is a happy number.

It is not a de Polignac number, because 28810761 - 2¹ = 28810759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28810751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16450 + ... + 18116.

It is an arithmetic number, because the mean of its divisors is an integer number (2748864).

Almost surely, 2^28810761 is an apocalyptic number.

28810761 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28810761 is a deficient number, since it is larger than the sum of its proper divisors (15171063).

28810761 is a wasteful number, since it uses less digits than its factorization.

28810761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 28810761 is about 5367.5656493424. The cubic root of 28810761 is about 306.5619453137.

The spelling of 28810761 in words is "twenty-eight million, eight hundred ten thousand, seven hundred sixty-one".