40145656 has 8 divisors (see below), whose sum is σ = 75273120. Its totient is φ = 20072824.

The previous prime is 40145641. The next prime is 40145701. The reversal of 40145656 is 65654104.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×40145656² = 3223347391340672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2509096 + ... + 2509111.

It is an arithmetic number, because the mean of its divisors is an integer number (9409140).

Almost surely, 2^40145656 is an apocalyptic number.

It is an amenable number.

40145656 is a deficient number, since it is larger than the sum of its proper divisors (35127464).

40145656 is a wasteful number, since it uses less digits than its factorization.

40145656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5018213 (or 5018209 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 40145656 is about 6336.0599744636. The cubic root of 40145656 is about 342.4098002479.

The spelling of 40145656 in words is "forty million, one hundred forty-five thousand, six hundred fifty-six".