40115772 has 36 divisors (see below), whose sum is σ = 105814800. Its totient is φ = 12790272.

The previous prime is 40115741. The next prime is 40115773. The reversal of 40115772 is 27751104.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40115773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23397 + ... + 25052.

It is an arithmetic number, because the mean of its divisors is an integer number (2939300).

Almost surely, 2^40115772 is an apocalyptic number.

It is an amenable number.

40115772 is an abundant number, since it is smaller than the sum of its proper divisors (65699028).

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

40115772 is a wasteful number, since it uses less digits than its factorization.

40115772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48482 (or 48477 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 40115772 is about 6333.7012875569. The cubic root of 40115772 is about 342.3248170845.

Adding to 40115772 its reverse (27751104), we get a palindrome (67866876).

The spelling of 40115772 in words is "forty million, one hundred fifteen thousand, seven hundred seventy-two".