28667040 has 48 divisors (see below), whose sum is σ = 90302688. Its totient is φ = 7644416.

The previous prime is 28667017. The next prime is 28667057. The reversal of 28667040 is 4076682.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 28666992 and 28667010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29382 + ... + 30341.

It is an arithmetic number, because the mean of its divisors is an integer number (1881306).

Almost surely, 2^28667040 is an apocalyptic number.

28667040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28667040 is an abundant number, since it is smaller than the sum of its proper divisors (61635648).

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

28667040 is a wasteful number, since it uses less digits than its factorization.

28667040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59741 (or 59733 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28667040 is about 5354.1609987000. The cubic root of 28667040 is about 306.0513391583.

The spelling of 28667040 in words is "twenty-eight million, six hundred sixty-seven thousand, forty".