28332501 has 8 divisors (see below), whose sum is σ = 37851264. Its totient is φ = 18851040.

The previous prime is 28332463. The next prime is 28332511. The reversal of 28332501 is 10523382.

28332501 = T₃₃ + T₃₄ + ... + T₅₅₃.

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

It is not a de Polignac number, because 28332501 - 2¹⁰ = 28331477 is a prime.

It is a super-2 number, since 2×28332501² = 1605461225830002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28332511) 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, 7501 + ... + 10626.

It is an arithmetic number, because the mean of its divisors is an integer number (4731408).

Almost surely, 2^28332501 is an apocalyptic number.

It is an amenable number.

28332501 is a deficient number, since it is larger than the sum of its proper divisors (9518763).

28332501 is a wasteful number, since it uses less digits than its factorization.

28332501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18651.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 28332501 is about 5322.8282895468. The cubic root of 28332501 is about 304.8561572013.

Adding to 28332501 its reverse (10523382), we get a palindrome (38855883).

The spelling of 28332501 in words is "twenty-eight million, three hundred thirty-two thousand, five hundred one".