40978629 has 20 divisors (see below), whose sum is σ = 61833420. Its totient is φ = 27043200.

The previous prime is 40978601. The next prime is 40978633. The reversal of 40978629 is 92687904.

40978629 = T₄₅₅ + T₄₅₆ + ... + T₆₉₇.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31337604 + 9641025 = 5598^2 + 3105^2 .

It is not a de Polignac number, because 40978629 - 2¹¹ = 40976581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40978429) 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 19 ways as a sum of consecutive naturals, for example, 5677 + ... + 10685.

It is an arithmetic number, because the mean of its divisors is an integer number (3091671).

Almost surely, 2^40978629 is an apocalyptic number.

It is an amenable number.

40978629 is a deficient number, since it is larger than the sum of its proper divisors (20854791).

40978629 is a wasteful number, since it uses less digits than its factorization.

40978629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122 (or 5113 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 40978629 is about 6401.4552251812. The cubic root of 40978629 is about 344.7618015520.

The spelling of 40978629 in words is "forty million, nine hundred seventy-eight thousand, six hundred twenty-nine".