28901500 has 24 divisors (see below), whose sum is σ = 63121968. Its totient is φ = 11560400.

The previous prime is 28901497. The next prime is 28901507. The reversal of 28901500 is 510982.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28901507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28402 + ... + 29401.

It is an arithmetic number, because the mean of its divisors is an integer number (2630082).

Almost surely, 2^28901500 is an apocalyptic number.

28901500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28901500 is an abundant number, since it is smaller than the sum of its proper divisors (34220468).

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

28901500 is a wasteful number, since it uses less digits than its factorization.

28901500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57822 (or 57810 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 28901500 is about 5376.0115327257. The cubic root of 28901500 is about 306.8834452347.

The spelling of 28901500 in words is "twenty-eight million, nine hundred one thousand, five hundred".