28497630 has 64 divisors (see below), whose sum is σ = 79027200. Its totient is φ = 6441984.

The previous prime is 28497629. The next prime is 28497647. The reversal of 28497630 is 3679482.

It is a super-2 number, since 2×28497630² = 1624229831233800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19671 + ... + 21069.

It is an arithmetic number, because the mean of its divisors is an integer number (1234800).

Almost surely, 2^28497630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28497630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39513600).

28497630 is an abundant number, since it is smaller than the sum of its proper divisors (50529570).

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

28497630 is a wasteful number, since it uses less digits than its factorization.

28497630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 28497630 is about 5338.3171505635. The cubic root of 28497630 is about 305.4472699611.

The spelling of 28497630 in words is "twenty-eight million, four hundred ninety-seven thousand, six hundred thirty".