28528970 has 24 divisors (see below), whose sum is σ = 53691876. Its totient is φ = 10913408.

The previous prime is 28528967. The next prime is 28528979. The reversal of 28528970 is 7982582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27258841 + 1270129 = 5221^2 + 1127^2 .

It is not an unprimeable number, because it can be changed into a prime (28528979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2594 + ... + 7986.

Almost surely, 2^28528970 is an apocalyptic number.

28528970 is a deficient number, since it is larger than the sum of its proper divisors (25162906).

28528970 is a wasteful number, since it uses less digits than its factorization.

28528970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5446 (or 5423 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 28528970 is about 5341.2517259534. The cubic root of 28528970 is about 305.5591998586.

The spelling of 28528970 in words is "twenty-eight million, five hundred twenty-eight thousand, nine hundred seventy".