40078632 has 32 divisors (see below), whose sum is σ = 109306080. Its totient is φ = 12144960.

The previous prime is 40078631. The next prime is 40078651. The reversal of 40078632 is 23687004.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 40078632.

It is not an unprimeable number, because it can be changed into a prime (40078631) 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 7 ways as a sum of consecutive naturals, for example, 75643 + ... + 76170.

It is an arithmetic number, because the mean of its divisors is an integer number (3415815).

Almost surely, 2^40078632 is an apocalyptic number.

It is an amenable number.

40078632 is an abundant number, since it is smaller than the sum of its proper divisors (69227448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40078632 is a wasteful number, since it uses less digits than its factorization.

40078632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151833 (or 151829 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 40078632 is about 6330.7686737078. The cubic root of 40078632 is about 342.2191406993.

The spelling of 40078632 in words is "forty million, seventy-eight thousand, six hundred thirty-two".