40456642 has 4 divisors (see below), whose sum is σ = 60684966. Its totient is φ = 20228320.

The previous prime is 40456639. The next prime is 40456657. The reversal of 40456642 is 24665404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 29822521 + 10634121 = 5461^2 + 3261^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10114159 + ... + 10114162.

Almost surely, 2^40456642 is an apocalyptic number.

40456642 is a deficient number, since it is larger than the sum of its proper divisors (20228324).

40456642 is a wasteful number, since it uses less digits than its factorization.

40456642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20228323.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 40456642 is about 6360.5535922591. The cubic root of 40456642 is about 343.2916795751.

The spelling of 40456642 in words is "forty million, four hundred fifty-six thousand, six hundred forty-two".