28401066 has 48 divisors (see below), whose sum is σ = 64022400. Its totient is φ = 9092544.

The previous prime is 28401049. The next prime is 28401083. The reversal of 28401066 is 66010482.

It is an interprime number because it is at equal distance from previous prime (28401049) and next prime (28401083).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49630 + ... + 50198.

It is an arithmetic number, because the mean of its divisors is an integer number (1333800).

Almost surely, 2^28401066 is an apocalyptic number.

28401066 is an abundant number, since it is smaller than the sum of its proper divisors (35621334).

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

28401066 is a wasteful number, since it uses less digits than its factorization.

28401066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28401066 is about 5329.2650525190. The cubic root of 28401066 is about 305.1018776390.

The spelling of 28401066 in words is "twenty-eight million, four hundred one thousand, sixty-six".