40423555 has 8 divisors (see below), whose sum is σ = 49330800. Its totient is φ = 31790496.

The previous prime is 40423553. The next prime is 40423571. The reversal of 40423555 is 55532404.

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

It is a cyclic number.

It is not a de Polignac number, because 40423555 - 2¹ = 40423553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40423553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68220 + ... + 68809.

It is an arithmetic number, because the mean of its divisors is an integer number (6166350).

Almost surely, 2^40423555 is an apocalyptic number.

40423555 is a deficient number, since it is larger than the sum of its proper divisors (8907245).

40423555 is a wasteful number, since it uses less digits than its factorization.

40423555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137093.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 40423555 is about 6357.9521074006. The cubic root of 40423555 is about 343.1980683317.

Adding to 40423555 its reverse (55532404), we get a palindrome (95955959).

The spelling of 40423555 in words is "forty million, four hundred twenty-three thousand, five hundred fifty-five".