23490978 has 64 divisors (see below), whose sum is σ = 55924992. Its totient is φ = 6439680.

The previous prime is 23490959. The next prime is 23490997. The reversal of 23490978 is 87909432.

23490978 is nontrivially palindromic in base 13.

It is an interprime number because it is at equal distance from previous prime (23490959) and next prime (23490997).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135700 + ... + 135872.

It is an arithmetic number, because the mean of its divisors is an integer number (873828).

Almost surely, 2^23490978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23490978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27962496).

23490978 is an abundant number, since it is smaller than the sum of its proper divisors (32434014).

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

23490978 is a wasteful number, since it uses less digits than its factorization.

23490978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 23490978 is about 4846.7492198380. The cubic root of 23490978 is about 286.3960558454.

The spelling of 23490978 in words is "twenty-three million, four hundred ninety thousand, nine hundred seventy-eight".