23420784 has 20 divisors (see below), whose sum is σ = 60503816. Its totient is φ = 7806912.

The previous prime is 23420783. The next prime is 23420791. The reversal of 23420784 is 48702432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23420783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243919 + ... + 244014.

Almost surely, 2^23420784 is an apocalyptic number.

23420784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

23420784 is an abundant number, since it is smaller than the sum of its proper divisors (37083032).

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

23420784 is a wasteful number, since it uses less digits than its factorization.

23420784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487944 (or 487938 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 23420784 is about 4839.5024537653. The cubic root of 23420784 is about 286.1105087478.

The spelling of 23420784 in words is "twenty-three million, four hundred twenty thousand, seven hundred eighty-four".