23370640 has 20 divisors (see below), whose sum is σ = 54336924. Its totient is φ = 9348224.

The previous prime is 23370617. The next prime is 23370673. The reversal of 23370640 is 4607332.

It can be written as a sum of positive squares in 2 ways, for example, as 6330256 + 17040384 = 2516^2 + 4128^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145987 + ... + 146146.

Almost surely, 2^23370640 is an apocalyptic number.

23370640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23370640 is an abundant number, since it is smaller than the sum of its proper divisors (30966284).

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

23370640 is a wasteful number, since it uses less digits than its factorization.

23370640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292146 (or 292140 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 23370640 is about 4834.3189799598. The cubic root of 23370640 is about 285.9061749056.

Adding to 23370640 its reverse (4607332), we get a palindrome (27977972).

The spelling of 23370640 in words is "twenty-three million, three hundred seventy thousand, six hundred forty".