40233749 has 4 divisors (see below), whose sum is σ = 40527564. Its totient is φ = 39939936.

The previous prime is 40233733. The next prime is 40233761. The reversal of 40233749 is 94733204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23571025 + 16662724 = 4855^2 + 4082^2 .

It is a cyclic number.

It is not a de Polignac number, because 40233749 - 2⁴ = 40233733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40233719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146702 + ... + 146975.

It is an arithmetic number, because the mean of its divisors is an integer number (10131891).

Almost surely, 2^40233749 is an apocalyptic number.

It is an amenable number.

40233749 is a deficient number, since it is larger than the sum of its proper divisors (293815).

40233749 is a wasteful number, since it uses less digits than its factorization.

40233749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293814.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 40233749 is about 6343.0078827004. The cubic root of 40233749 is about 342.6600711627.

The spelling of 40233749 in words is "forty million, two hundred thirty-three thousand, seven hundred forty-nine".