28623877 has 4 divisors (see below), whose sum is σ = 28645056. Its totient is φ = 28602700.

The previous prime is 28623871. The next prime is 28623901. The reversal of 28623877 is 77832682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28623877 - 2²³ = 20235269 is a prime.

It is a super-2 number, since 2×28623877² = 1638652669022258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28623871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8413 + ... + 11314.

It is an arithmetic number, because the mean of its divisors is an integer number (7161264).

Almost surely, 2^28623877 is an apocalyptic number.

It is an amenable number.

28623877 is a deficient number, since it is larger than the sum of its proper divisors (21179).

28623877 is a wasteful number, since it uses less digits than its factorization.

28623877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21178.

The product of its digits is 225792, while the sum is 43.

The square root of 28623877 is about 5350.1286900410. The cubic root of 28623877 is about 305.8976582586.

The spelling of 28623877 in words is "twenty-eight million, six hundred twenty-three thousand, eight hundred seventy-seven".