28941550 has 48 divisors (see below), whose sum is σ = 59420304. Its totient is φ = 10400000.

The previous prime is 28941533. The next prime is 28941553. The reversal of 28941550 is 5514982.

It is a super-2 number, since 2×28941550² = 1675226632805000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28941553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55290 + ... + 55810.

It is an arithmetic number, because the mean of its divisors is an integer number (1237923).

Almost surely, 2^28941550 is an apocalyptic number.

28941550 is an abundant number, since it is smaller than the sum of its proper divisors (30478754).

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

28941550 is a wasteful number, since it uses less digits than its factorization.

28941550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 28941550 is about 5379.7351235911. The cubic root of 28941550 is about 307.0251334875.

It can be divided in two parts, 2894 and 1550, that added together give a palindrome (4444).

The spelling of 28941550 in words is "twenty-eight million, nine hundred forty-one thousand, five hundred fifty".