28152532 has 6 divisors (see below), whose sum is σ = 49266938. Its totient is φ = 14076264.

The previous prime is 28152511. The next prime is 28152563. The reversal of 28152532 is 23525182.

It can be written as a sum of positive squares in only one way, i.e., 20830096 + 7322436 = 4564^2 + 2706^2 .

It is a super-2 number, since 2×28152532² = 1585130116022048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28152532.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3519063 + ... + 3519070.

Almost surely, 2^28152532 is an apocalyptic number.

It is an amenable number.

28152532 is a deficient number, since it is larger than the sum of its proper divisors (21114406).

28152532 is a wasteful number, since it uses less digits than its factorization.

28152532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7038137 (or 7038135 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 28152532 is about 5305.8959658101. The cubic root of 28152532 is about 304.2093001185.

The spelling of 28152532 in words is "twenty-eight million, one hundred fifty-two thousand, five hundred thirty-two".