40148239 has 4 divisors (see below), whose sum is σ = 40171824. Its totient is φ = 40124656.

The previous prime is 40148231. The next prime is 40148249. The reversal of 40148239 is 93284104.

40148239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40148239 - 2³ = 40148231 is a prime.

It is a super-2 number, since 2×40148239² = 3223762189602242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40148239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40148231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9022 + ... + 12715.

It is an arithmetic number, because the mean of its divisors is an integer number (10042956).

Almost surely, 2^40148239 is an apocalyptic number.

40148239 is a deficient number, since it is larger than the sum of its proper divisors (23585).

40148239 is a wasteful number, since it uses less digits than its factorization.

40148239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23584.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 40148239 is about 6336.2638044829. The cubic root of 40148239 is about 342.4171437203.

The spelling of 40148239 in words is "forty million, one hundred forty-eight thousand, two hundred thirty-nine".