23749380 has 36 divisors (see below), whose sum is σ = 72040332. Its totient is φ = 6333120.

The previous prime is 23749351. The next prime is 23749387. The reversal of 23749380 is 8394732.

23749380 is a `hidden beast` number, since 237 + 49 + 380 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8020224 + 15729156 = 2832^2 + 3966^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (23749387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65791 + ... + 66150.

Almost surely, 2^23749380 is an apocalyptic number.

23749380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23749380 is an abundant number, since it is smaller than the sum of its proper divisors (48290952).

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

23749380 is a wasteful number, since it uses less digits than its factorization.

23749380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131956 (or 131951 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 23749380 is about 4873.3335613315. Note that the first 3 decimals coincide. The cubic root of 23749380 is about 287.4423526510.

The spelling of 23749380 in words is "twenty-three million, seven hundred forty-nine thousand, three hundred eighty".