23280642 has 96 divisors (see below), whose sum is σ = 65116800. Its totient is φ = 6035040.

The previous prime is 23280641. The next prime is 23280671. The reversal of 23280642 is 24608232.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (23280641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45484 + ... + 45992.

It is an arithmetic number, because the mean of its divisors is an integer number (678300).

Almost surely, 2^23280642 is an apocalyptic number.

23280642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 23280642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32558400).

23280642 is an abundant number, since it is smaller than the sum of its proper divisors (41836158).

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

23280642 is a wasteful number, since it uses less digits than its factorization.

23280642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 23280642 is about 4825.0017616577. The cubic root of 23280642 is about 285.5387040971.

Adding to 23280642 its reverse (24608232), we get a palindrome (47888874).

The spelling of 23280642 in words is "twenty-three million, two hundred eighty thousand, six hundred forty-two".