28640130 has 16 divisors (see below), whose sum is σ = 68736384. Its totient is φ = 7637360.

The previous prime is 28640119. The next prime is 28640147. The reversal of 28640130 is 3104682.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28640130.

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, 477306 + ... + 477365.

It is an arithmetic number, because the mean of its divisors is an integer number (4296024).

Almost surely, 2^28640130 is an apocalyptic number.

28640130 is an abundant number, since it is smaller than the sum of its proper divisors (40096254).

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

28640130 is a wasteful number, since it uses less digits than its factorization.

28640130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954681.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 28640130 is about 5351.6474099103. The cubic root of 28640130 is about 305.9555448256.

The spelling of 28640130 in words is "twenty-eight million, six hundred forty thousand, one hundred thirty".