40420236 has 12 divisors (see below), whose sum is σ = 94313912. Its totient is φ = 13473408.

The previous prime is 40420231. The next prime is 40420241. The reversal of 40420236 is 63202404.

It is an interprime number because it is at equal distance from previous prime (40420231) and next prime (40420241).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (40420231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684165 + ... + 1684188.

Almost surely, 2^40420236 is an apocalyptic number.

It is an amenable number.

40420236 is an abundant number, since it is smaller than the sum of its proper divisors (53893676).

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

40420236 is a wasteful number, since it uses less digits than its factorization.

40420236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368360 (or 3368358 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 40420236 is about 6357.6910903252. The cubic root of 40420236 is about 343.1886752475.

The spelling of 40420236 in words is "forty million, four hundred twenty thousand, two hundred thirty-six".