23749740 has 192 divisors, whose sum is σ = 86661120. Its totient is φ = 5287680.

The previous prime is 23749709. The next prime is 23749757. The reversal of 23749740 is 4794732.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 23749695 and 23749704.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 230529 + ... + 230631.

It is an arithmetic number, because the mean of its divisors is an integer number (451360).

Almost surely, 2^23749740 is an apocalyptic number.

23749740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23749740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43330560).

23749740 is an abundant number, since it is smaller than the sum of its proper divisors (62911380).

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

23749740 is a wasteful number, since it uses less digits than its factorization.

23749740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 23749740 is about 4873.3704968943. The cubic root of 23749740 is about 287.4438050218.

The spelling of 23749740 in words is "twenty-three million, seven hundred forty-nine thousand, seven hundred forty".