28666970 has 32 divisors (see below), whose sum is σ = 54369792. Its totient is φ = 10861312.

The previous prime is 28666969. The next prime is 28666987. The reversal of 28666970 is 7966682.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25439 + ... + 26541.

It is an arithmetic number, because the mean of its divisors is an integer number (1699056).

Almost surely, 2^28666970 is an apocalyptic number.

28666970 is a deficient number, since it is larger than the sum of its proper divisors (25702822).

28666970 is a wasteful number, since it uses less digits than its factorization.

28666970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 28666970 is about 5354.1544617241. The cubic root of 28666970 is about 306.0510900498.

The spelling of 28666970 in words is "twenty-eight million, six hundred sixty-six thousand, nine hundred seventy".