40640152 has 32 divisors (see below), whose sum is σ = 88521120. Its totient is φ = 17130240.

The previous prime is 40640137. The next prime is 40640153. The reversal of 40640152 is 25104604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2533 + ... + 9364.

It is an arithmetic number, because the mean of its divisors is an integer number (2766285).

Almost surely, 2^40640152 is an apocalyptic number.

It is an amenable number.

40640152 is an abundant number, since it is smaller than the sum of its proper divisors (47880968).

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

40640152 is a wasteful number, since it uses less digits than its factorization.

40640152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11971 (or 11967 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 40640152 is about 6374.9629018528. The cubic root of 40640152 is about 343.8099500069.

Adding to 40640152 its reverse (25104604), we get a palindrome (65744756).

The spelling of 40640152 in words is "forty million, six hundred forty thousand, one hundred fifty-two".