28661151 has 8 divisors (see below), whose sum is σ = 39876480. Its totient is φ = 18276632.

The previous prime is 28661137. The next prime is 28661153. The reversal of 28661151 is 15116682.

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

It is a cyclic number.

It is not a de Polignac number, because 28661151 - 2¹⁴ = 28644767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28661153) 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, 207621 + ... + 207758.

It is an arithmetic number, because the mean of its divisors is an integer number (4984560).

Almost surely, 2^28661151 is an apocalyptic number.

28661151 is a deficient number, since it is larger than the sum of its proper divisors (11215329).

28661151 is a wasteful number, since it uses less digits than its factorization.

28661151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415405.

The product of its digits is 2880, while the sum is 30.

The square root of 28661151 is about 5353.6110243461. The cubic root of 28661151 is about 306.0303805968.

The spelling of 28661151 in words is "twenty-eight million, six hundred sixty-one thousand, one hundred fifty-one".