28654980 has 48 divisors (see below), whose sum is σ = 81756864. Its totient is φ = 7496320.

The previous prime is 28654973. The next prime is 28655009. The reversal of 28654980 is 8945682.

It is a super-2 number, since 2×28654980² = 1642215757600800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1326 + ... + 7685.

It is an arithmetic number, because the mean of its divisors is an integer number (1703268).

Almost surely, 2^28654980 is an apocalyptic number.

28654980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28654980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40878432).

28654980 is an abundant number, since it is smaller than the sum of its proper divisors (53101884).

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

28654980 is a wasteful number, since it uses less digits than its factorization.

28654980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9076 (or 9074 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 28654980 is about 5353.0346533532. The cubic root of 28654980 is about 306.0084153352.

The spelling of 28654980 in words is "twenty-eight million, six hundred fifty-four thousand, nine hundred eighty".