40057236 has 144 divisors (see below), whose sum is σ = 115773840. Its totient is φ = 11612160.

The previous prime is 40057231. The next prime is 40057279. The reversal of 40057236 is 63275004.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 291600 + 39765636 = 540^2 + 6306^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40057231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 656646 + ... + 656706.

It is an arithmetic number, because the mean of its divisors is an integer number (803985).

Almost surely, 2^40057236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40057236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57886920).

40057236 is an abundant number, since it is smaller than the sum of its proper divisors (75716604).

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

40057236 is a wasteful number, since it uses less digits than its factorization.

40057236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 40057236 is about 6329.0786059268. The cubic root of 40057236 is about 342.1582318997.

The spelling of 40057236 in words is "forty million, fifty-seven thousand, two hundred thirty-six".