28950140 has 12 divisors (see below), whose sum is σ = 60795336. Its totient is φ = 11580048.

The previous prime is 28950139. The next prime is 28950143. The reversal of 28950140 is 4105982.

It is a super-2 number, since 2×28950140² = 1676221212039200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28950143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723734 + ... + 723773.

It is an arithmetic number, because the mean of its divisors is an integer number (5066278).

Almost surely, 2^28950140 is an apocalyptic number.

28950140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28950140 is an abundant number, since it is smaller than the sum of its proper divisors (31845196).

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

28950140 is a wasteful number, since it uses less digits than its factorization.

28950140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447516 (or 1447514 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 28950140 is about 5380.5334308040. The cubic root of 28950140 is about 307.0555060259.

The spelling of 28950140 in words is "twenty-eight million, nine hundred fifty thousand, one hundred forty".