40630978 has 4 divisors (see below), whose sum is σ = 60946470. Its totient is φ = 20315488.

The previous prime is 40630963. The next prime is 40630979. The reversal of 40630978 is 87903604.

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., 33907329 + 6723649 = 5823^2 + 2593^2 .

It is not an unprimeable number, because it can be changed into a prime (40630979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157743 + ... + 10157746.

Almost surely, 2^40630978 is an apocalyptic number.

40630978 is a deficient number, since it is larger than the sum of its proper divisors (20315492).

40630978 is a wasteful number, since it uses less digits than its factorization.

40630978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20315491.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 40630978 is about 6374.2433276429. The cubic root of 40630978 is about 343.7840778117.

The spelling of 40630978 in words is "forty million, six hundred thirty thousand, nine hundred seventy-eight".