28980501 has 8 divisors (see below), whose sum is σ = 42153504. Its totient is φ = 17563920.

The previous prime is 28980463. The next prime is 28980517. The reversal of 28980501 is 10508982.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-28980501 is a prime.

It is a super-2 number, since 2×28980501² = 1679738876422002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 878197 = 28980501 / (2 + 8 + 9 + 8 + 0 + 5 + 0 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28980101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439066 + ... + 439131.

It is an arithmetic number, because the mean of its divisors is an integer number (5269188).

Almost surely, 2^28980501 is an apocalyptic number.

It is an amenable number.

28980501 is a deficient number, since it is larger than the sum of its proper divisors (13173003).

28980501 is a wasteful number, since it uses less digits than its factorization.

28980501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878211.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 28980501 is about 5383.3540660075. The cubic root of 28980501 is about 307.1628083875.

The spelling of 28980501 in words is "twenty-eight million, nine hundred eighty thousand, five hundred one".