23387028 has 48 divisors (see below), whose sum is σ = 62845440. Its totient is φ = 6630624.

The previous prime is 23387027. The next prime is 23387033. The reversal of 23387028 is 82078332.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 23387028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23387027) by changing a digit.

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, 10675 + ... + 12677.

It is an arithmetic number, because the mean of its divisors is an integer number (1309280).

Almost surely, 2^23387028 is an apocalyptic number.

23387028 is a gapful number since it is divisible by the number (28) 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 23387028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31422720).

23387028 is an abundant number, since it is smaller than the sum of its proper divisors (39458412).

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

23387028 is a wasteful number, since it uses less digits than its factorization.

23387028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156 (or 2154 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 23387028 is about 4836.0136476234. The cubic root of 23387028 is about 285.9729871630.

The spelling of 23387028 in words is "twenty-three million, three hundred eighty-seven thousand, twenty-eight".