23990489856 has 216 divisors, whose sum is σ = 70871988096. Its totient is φ = 7801896960.

The previous prime is 23990489849. The next prime is 23990489863. The reversal of 23990489856 is 65898409932.

It is an interprime number because it is at equal distance from previous prime (23990489849) and next prime (23990489863).

It is a junction number, because it is equal to n+sod(n) for n = 23990489793 and 23990489802.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27230536 + ... + 27231416.

It is an arithmetic number, because the mean of its divisors is an integer number (328111056).

Almost surely, 2^23990489856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23990489856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35435994048).

23990489856 is an abundant number, since it is smaller than the sum of its proper divisors (46881498240).

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

23990489856 is a wasteful number, since it uses less digits than its factorization.

23990489856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1162 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 63.

The spelling of 23990489856 in words is "twenty-three billion, nine hundred ninety million, four hundred eighty-nine thousand, eight hundred fifty-six".