23698840 has 32 divisors (see below), whose sum is σ = 58170960. Its totient is φ = 8617600.

The previous prime is 23698823. The next prime is 23698841. The reversal of 23698840 is 4889632.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 23698793 and 23698802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23698841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26491 + ... + 27370.

Almost surely, 2^23698840 is an apocalyptic number.

23698840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23698840 is an abundant number, since it is smaller than the sum of its proper divisors (34472120).

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

23698840 is a wasteful number, since it uses less digits than its factorization.

23698840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53883 (or 53879 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 23698840 is about 4868.1454374330. The cubic root of 23698840 is about 287.2383100795.

The spelling of 23698840 in words is "twenty-three million, six hundred ninety-eight thousand, eight hundred forty".