28622727 has 56 divisors (see below), whose sum is σ = 50365440. Its totient is φ = 15921360.

The previous prime is 28622723. The next prime is 28622731. The reversal of 28622727 is 72722682.

28622727 = 23³ + 24³ + ... + 103³.

28622727 is a `hidden beast` number, since 2 + 8 + 622 + 7 + 27 = 666.

It is an interprime number because it is at equal distance from previous prime (28622723) and next prime (28622731).

It is not a de Polignac number, because 28622727 - 2² = 28622723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28622691 and 28622700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28622723) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 362274 + ... + 362352.

Almost surely, 2^28622727 is an apocalyptic number.

28622727 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28622727 is a deficient number, since it is larger than the sum of its proper divisors (21742713).

28622727 is an frugal number, since it uses more digits than its factorization.

28622727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 160 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 28622727 is about 5350.0212149112. The cubic root of 28622727 is about 305.8935615969.

The spelling of 28622727 in words is "twenty-eight million, six hundred twenty-two thousand, seven hundred twenty-seven".