28301532 has 48 divisors (see below), whose sum is σ = 79914240. Its totient is φ = 7610112.

The previous prime is 28301531. The next prime is 28301551. The reversal of 28301532 is 23510382.

28301532 = 639² + 640² + ... + 701².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28301531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8482 + ... + 11337.

It is an arithmetic number, because the mean of its divisors is an integer number (1664880).

Almost surely, 2^28301532 is an apocalyptic number.

It is an amenable number.

28301532 is an abundant number, since it is smaller than the sum of its proper divisors (51612708).

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

28301532 is a wasteful number, since it uses less digits than its factorization.

28301532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19850 (or 19848 counting only the distinct ones).

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

The square root of 28301532 is about 5319.9184204271. The cubic root of 28301532 is about 304.7450417923.

The spelling of 28301532 in words is "twenty-eight million, three hundred one thousand, five hundred thirty-two".