40420238 has 8 divisors (see below), whose sum is σ = 61774488. Its totient is φ = 19828744.

The previous prime is 40420231. The next prime is 40420241. The reversal of 40420238 is 83202404.

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 (40420231) 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, 190556 + ... + 190767.

It is an arithmetic number, because the mean of its divisors is an integer number (7721811).

Almost surely, 2^40420238 is an apocalyptic number.

40420238 is a deficient number, since it is larger than the sum of its proper divisors (21354250).

40420238 is a wasteful number, since it uses less digits than its factorization.

40420238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381378.

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

The square root of 40420238 is about 6357.6912476150. The cubic root of 40420238 is about 343.1886809079.

The spelling of 40420238 in words is "forty million, four hundred twenty thousand, two hundred thirty-eight".