40238420 has 24 divisors (see below), whose sum is σ = 85294944. Its totient is φ = 15944096.

The previous prime is 40238389. The next prime is 40238423. The reversal of 40238420 is 2483204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40238423) 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, 7262 + ... + 11541.

It is an arithmetic number, because the mean of its divisors is an integer number (3553956).

Almost surely, 2^40238420 is an apocalyptic number.

It is an amenable number.

40238420 is an abundant number, since it is smaller than the sum of its proper divisors (45056524).

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

40238420 is a wasteful number, since it uses less digits than its factorization.

40238420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18919 (or 18917 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 40238420 is about 6343.3760727234. The cubic root of 40238420 is about 342.6733312018.

The spelling of 40238420 in words is "forty million, two hundred thirty-eight thousand, four hundred twenty".