28409770 has 16 divisors (see below), whose sum is σ = 51228288. Its totient is φ = 11343760.

The previous prime is 28409767. The next prime is 28409783. The reversal of 28409770 is 7790482.

It is a happy number.

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, 4275 + ... + 8665.

It is an arithmetic number, because the mean of its divisors is an integer number (3201768).

Almost surely, 2^28409770 is an apocalyptic number.

28409770 is a deficient number, since it is larger than the sum of its proper divisors (22818518).

28409770 is a wasteful number, since it uses less digits than its factorization.

28409770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 28409770 is about 5330.0816128836. The cubic root of 28409770 is about 305.1330423789.

The spelling of 28409770 in words is "twenty-eight million, four hundred nine thousand, seven hundred seventy".