40161500 has 48 divisors (see below), whose sum is σ = 89631360. Its totient is φ = 15713600.

The previous prime is 40161469. The next prime is 40161503. The reversal of 40161500 is 516104.

It is a happy number.

It is a super-2 number, since 2×40161500² = 3225892164500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40161503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22646 + ... + 24354.

It is an arithmetic number, because the mean of its divisors is an integer number (1867320).

Almost surely, 2^40161500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40161500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44815680).

40161500 is an abundant number, since it is smaller than the sum of its proper divisors (49469860).

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

40161500 is a wasteful number, since it uses less digits than its factorization.

40161500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775 (or 1763 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 40161500 is about 6337.3101549474. The cubic root of 40161500 is about 342.4548398020.

Adding to 40161500 its reverse (516104), we get a palindrome (40677604).

The spelling of 40161500 in words is "forty million, one hundred sixty-one thousand, five hundred".