23078520 has 160 divisors (see below), whose sum is σ = 82328400. Its totient is φ = 5778432.

The previous prime is 23078441. The next prime is 23078527. The reversal of 23078520 is 2587032.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23078527) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 54871 + ... + 55289.

Almost surely, 2^23078520 is an apocalyptic number.

23078520 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 23078520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41164200).

23078520 is an abundant number, since it is smaller than the sum of its proper divisors (59249880).

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

23078520 is a wasteful number, since it uses less digits than its factorization.

23078520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 23078520 is about 4804.0108243009. The cubic root of 23078520 is about 284.7099542267.

The spelling of 23078520 in words is "twenty-three million, seventy-eight thousand, five hundred twenty".