28700655 has 8 divisors (see below), whose sum is σ = 45921072. Its totient is φ = 15307008.

The previous prime is 28700647. The next prime is 28700657. The reversal of 28700655 is 55600782.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28700655 - 2³ = 28700647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28700657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956674 + ... + 956703.

It is an arithmetic number, because the mean of its divisors is an integer number (5740134).

Almost surely, 2^28700655 is an apocalyptic number.

28700655 is a deficient number, since it is larger than the sum of its proper divisors (17220417).

28700655 is a wasteful number, since it uses less digits than its factorization.

28700655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913385.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 28700655 is about 5357.2992262893. The cubic root of 28700655 is about 306.1709178007.

The spelling of 28700655 in words is "twenty-eight million, seven hundred thousand, six hundred fifty-five".