40149956 has 48 divisors (see below), whose sum is σ = 89077632. Its totient is φ = 15379200.

The previous prime is 40149953. The next prime is 40150001. The reversal of 40149956 is 65994104.

It is a super-2 number, since 2×40149956² = 3224037933603872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40149953) 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 15 ways as a sum of consecutive naturals, for example, 17720 + ... + 19856.

It is an arithmetic number, because the mean of its divisors is an integer number (1855784).

Almost surely, 2^40149956 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 40149956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44538816).

40149956 is an abundant number, since it is smaller than the sum of its proper divisors (48927676).

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

40149956 is a wasteful number, since it uses less digits than its factorization.

40149956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220 (or 2218 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 40149956 is about 6336.3992929739. The cubic root of 40149956 is about 342.4220249793.

The spelling of 40149956 in words is "forty million, one hundred forty-nine thousand, nine hundred fifty-six".