28100408 has 32 divisors (see below), whose sum is σ = 60434400. Its totient is φ = 11999232.

The previous prime is 28100399. The next prime is 28100437. The reversal of 28100408 is 80400182.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18128 + ... + 19616.

It is an arithmetic number, because the mean of its divisors is an integer number (1888575).

Almost surely, 2^28100408 is an apocalyptic number.

28100408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28100408 is an abundant number, since it is smaller than the sum of its proper divisors (32333992).

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

28100408 is a wasteful number, since it uses less digits than its factorization.

28100408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 28100408 is about 5300.9817958563. The cubic root of 28100408 is about 304.0214377772.

The spelling of 28100408 in words is "twenty-eight million, one hundred thousand, four hundred eight".