28406700 has 216 divisors, whose sum is σ = 106159872. Its totient is φ = 6454080.

The previous prime is 28406699. The next prime is 28406717. The reversal of 28406700 is 760482.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 170017 + ... + 170183.

Almost surely, 2^28406700 is an apocalyptic number.

28406700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28406700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53079936).

28406700 is an abundant number, since it is smaller than the sum of its proper divisors (77753172).

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

28406700 is a wasteful number, since it uses less digits than its factorization.

28406700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28406700 is about 5329.7936170175. The cubic root of 28406700 is about 305.1220509467.

The spelling of 28406700 in words is "twenty-eight million, four hundred six thousand, seven hundred".