40423420 has 24 divisors (see below), whose sum is σ = 88581024. Its totient is φ = 15466176.

The previous prime is 40423387. The next prime is 40423421. The reversal of 40423420 is 2432404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423421) 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, 43479 + ... + 44398.

It is an arithmetic number, because the mean of its divisors is an integer number (3690876).

Almost surely, 2^40423420 is an apocalyptic number.

It is an amenable number.

40423420 is an abundant number, since it is smaller than the sum of its proper divisors (48157604).

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

40423420 is a wasteful number, since it uses less digits than its factorization.

40423420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87909 (or 87907 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 40423420 is about 6357.9414907657. The cubic root of 40423420 is about 343.1976862789.

Adding to 40423420 its reverse (2432404), we get a palindrome (42855824).

The spelling of 40423420 in words is "forty million, four hundred twenty-three thousand, four hundred twenty".