40423340 has 12 divisors (see below), whose sum is σ = 84889056. Its totient is φ = 16169328.

The previous prime is 40423333. The next prime is 40423343. The reversal of 40423340 is 4332404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2021167 = 40423340 / (4 + 0 + 4 + 2 + 3 + 3 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (40423343) 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, 1010564 + ... + 1010603.

It is an arithmetic number, because the mean of its divisors is an integer number (7074088).

Almost surely, 2^40423340 is an apocalyptic number.

It is an amenable number.

40423340 is an abundant number, since it is smaller than the sum of its proper divisors (44465716).

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

40423340 is a wasteful number, since it uses less digits than its factorization.

40423340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021176 (or 2021174 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 40423340 is about 6357.9351994181. The cubic root of 40423340 is about 343.1974598769.

Adding to 40423340 its reverse (4332404), we get a palindrome (44755744).

The spelling of 40423340 in words is "forty million, four hundred twenty-three thousand, three hundred forty".