40406072 has 32 divisors (see below), whose sum is σ = 88929120. Its totient is φ = 16848000.

The previous prime is 40405993. The next prime is 40406081. The reversal of 40406072 is 27060404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7679 + ... + 11822.

It is an arithmetic number, because the mean of its divisors is an integer number (2779035).

Almost surely, 2^40406072 is an apocalyptic number.

It is an amenable number.

40406072 is an abundant number, since it is smaller than the sum of its proper divisors (48523048).

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

40406072 is a wasteful number, since it uses less digits than its factorization.

40406072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19551 (or 19547 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 40406072 is about 6356.5770663149. The cubic root of 40406072 is about 343.1485840063.

Adding to 40406072 its reverse (27060404), we get a palindrome (67466476).

The spelling of 40406072 in words is "forty million, four hundred six thousand, seventy-two".