40252390 has 8 divisors (see below), whose sum is σ = 72454320. Its totient is φ = 16100952.

The previous prime is 40252339. The next prime is 40252397. The reversal of 40252390 is 9325204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40252397) 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, 2012610 + ... + 2012629.

It is an arithmetic number, because the mean of its divisors is an integer number (9056790).

Almost surely, 2^40252390 is an apocalyptic number.

40252390 is a deficient number, since it is larger than the sum of its proper divisors (32201930).

40252390 is a wasteful number, since it uses less digits than its factorization.

40252390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4025246.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 40252390 is about 6344.4771258158. The cubic root of 40252390 is about 342.7129831277.

Adding to 40252390 its reverse (9325204), we get a palindrome (49577594).

The spelling of 40252390 in words is "forty million, two hundred fifty-two thousand, three hundred ninety".