40343656 has 24 divisors (see below), whose sum is σ = 79084530. Its totient is φ = 19292768.

The previous prime is 40343629. The next prime is 40343657. The reversal of 40343656 is 65634304.

It can be written as a sum of positive squares in only one way, i.e., 38564100 + 1779556 = 6210^2 + 1334^2 .

It is a super-2 number, since 2×40343656² = 3255221158892672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40343657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 535 + ... + 8998.

Almost surely, 2^40343656 is an apocalyptic number.

40343656 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

40343656 is a deficient number, since it is larger than the sum of its proper divisors (38740874).

40343656 is a wasteful number, since it uses less digits than its factorization.

40343656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9585 (or 9558 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 40343656 is about 6351.6656083267. The cubic root of 40343656 is about 342.9718036474.

The spelling of 40343656 in words is "forty million, three hundred forty-three thousand, six hundred fifty-six".