28661460 has 96 divisors (see below), whose sum is σ = 83994624. Its totient is φ = 7296000.

The previous prime is 28661459. The next prime is 28661489. The reversal of 28661460 is 6416682.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149965 + ... + 150155.

It is an arithmetic number, because the mean of its divisors is an integer number (874944).

Almost surely, 2^28661460 is an apocalyptic number.

28661460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28661460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41997312).

28661460 is an abundant number, since it is smaller than the sum of its proper divisors (55333164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28661460 is a wasteful number, since it uses less digits than its factorization.

28661460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 28661460 is about 5353.6398832944. The cubic root of 28661460 is about 306.0314803787.

The spelling of 28661460 in words is "twenty-eight million, six hundred sixty-one thousand, four hundred sixty".