28154664 has 48 divisors (see below), whose sum is σ = 76752000. Its totient is φ = 9323424.

The previous prime is 28154657. The next prime is 28154671. The reversal of 28154664 is 46645182.

It is an interprime number because it is at equal distance from previous prime (28154657) and next prime (28154671).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 10537 + ... + 12935.

It is an arithmetic number, because the mean of its divisors is an integer number (1599000).

Almost surely, 2^28154664 is an apocalyptic number.

28154664 is a gapful number since it is divisible by the number (24) 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 28154664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38376000).

28154664 is an abundant number, since it is smaller than the sum of its proper divisors (48597336).

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

28154664 is a wasteful number, since it uses less digits than its factorization.

28154664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574 (or 2567 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 28154664 is about 5306.0968705820. The cubic root of 28154664 is about 304.2169792130.

It can be divided in two parts, 281 and 54664, that added together give a palindrome (54945).

The spelling of 28154664 in words is "twenty-eight million, one hundred fifty-four thousand, six hundred sixty-four".