40688630 has 16 divisors (see below), whose sum is σ = 74622384. Its totient is φ = 15968160.

The previous prime is 40688623. The next prime is 40688639. The reversal of 40688630 is 3688604.

It is a super-2 number, since 2×40688630² = 3311129222553800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40688639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37856 + ... + 38915.

It is an arithmetic number, because the mean of its divisors is an integer number (4663899).

Almost surely, 2^40688630 is an apocalyptic number.

40688630 is a deficient number, since it is larger than the sum of its proper divisors (33933754).

40688630 is a wasteful number, since it uses less digits than its factorization.

40688630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76831.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 40688630 is about 6378.7639868551. The cubic root of 40688630 is about 343.9466013653.

The spelling of 40688630 in words is "forty million, six hundred eighty-eight thousand, six hundred thirty".