28617380 has 24 divisors (see below), whose sum is σ = 65560320. Its totient is φ = 10406240.

The previous prime is 28617373. The next prime is 28617397. The reversal of 28617380 is 8371682.

It is a self number, because there is not a number n which added to its sum of digits gives 28617380.

It is a congruent 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, 64820 + ... + 65259.

It is an arithmetic number, because the mean of its divisors is an integer number (2731680).

Almost surely, 2^28617380 is an apocalyptic number.

28617380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28617380 is an abundant number, since it is smaller than the sum of its proper divisors (36942940).

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

28617380 is a wasteful number, since it uses less digits than its factorization.

28617380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130099 (or 130097 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28617380 is about 5349.5214739264. The cubic root of 28617380 is about 305.8745124600.

The spelling of 28617380 in words is "twenty-eight million, six hundred seventeen thousand, three hundred eighty".