28661470 has 8 divisors (see below), whose sum is σ = 51590664. Its totient is φ = 11464584.

The previous prime is 28661459. The next prime is 28661489. The reversal of 28661470 is 7416682.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1433064 + ... + 1433083.

It is an arithmetic number, because the mean of its divisors is an integer number (6448833).

Almost surely, 2^28661470 is an apocalyptic number.

28661470 is a deficient number, since it is larger than the sum of its proper divisors (22929194).

28661470 is a wasteful number, since it uses less digits than its factorization.

28661470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866154.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28661470 is about 5353.6408172383. The cubic root of 28661470 is about 306.0315159702.

The spelling of 28661470 in words is "twenty-eight million, six hundred sixty-one thousand, four hundred seventy".