40001072 has 10 divisors (see below), whose sum is σ = 77502108. Its totient is φ = 20000528.

The previous prime is 40001069. The next prime is 40001083. The reversal of 40001072 is 27010004.

It is a happy number.

It is a super-2 number, since 2×40001072² = 3200171522298368, which contains 22 as substring.

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, 1250018 + ... + 1250049.

Almost surely, 2^40001072 is an apocalyptic number.

It is an amenable number.

40001072 is a deficient number, since it is larger than the sum of its proper divisors (37501036).

40001072 is a wasteful number, since it uses less digits than its factorization.

40001072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500075 (or 2500069 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 40001072 is about 6324.6400688102. The cubic root of 40001072 is about 341.9982444651.

Adding to 40001072 its reverse (27010004), we get a palindrome (67011076).

The spelling of 40001072 in words is "forty million, one thousand, seventy-two".