23015040 has 64 divisors (see below), whose sum is σ = 73366560. Its totient is φ = 6136832.

The previous prime is 23015029. The next prime is 23015081. The reversal of 23015040 is 4051032.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4074 + ... + 7913.

Almost surely, 2^23015040 is an apocalyptic number.

23015040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23015040 is an abundant number, since it is smaller than the sum of its proper divisors (50351520).

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

23015040 is a wasteful number, since it uses less digits than its factorization.

23015040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12009 (or 11997 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 23015040 is about 4797.3992954517. The cubic root of 23015040 is about 284.4486725355.

Adding to 23015040 its reverse (4051032), we get a palindrome (27066072).

The spelling of 23015040 in words is "twenty-three million, fifteen thousand, forty".