28951500 has 48 divisors (see below), whose sum is σ = 84311136. Its totient is φ = 7720000.

The previous prime is 28951471. The next prime is 28951519. The reversal of 28951500 is 515982.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8151 + ... + 11150.

It is an arithmetic number, because the mean of its divisors is an integer number (1756482).

Almost surely, 2^28951500 is an apocalyptic number.

28951500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28951500 is an abundant number, since it is smaller than the sum of its proper divisors (55359636).

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

28951500 is a wasteful number, since it uses less digits than its factorization.

28951500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19323 (or 19311 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 28951500 is about 5380.6598108410. The cubic root of 28951500 is about 307.0603141656.

The spelling of 28951500 in words is "twenty-eight million, nine hundred fifty-one thousand, five hundred".