40047660 has 72 divisors (see below), whose sum is σ = 125414016. Its totient is φ = 10333440.

The previous prime is 40047641. The next prime is 40047661. The reversal of 40047660 is 6674004.

It is not an unprimeable number, because it can be changed into a prime (40047661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1992 + ... + 9168.

Almost surely, 2^40047660 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 40047660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62707008).

40047660 is an abundant number, since it is smaller than the sum of its proper divisors (85366356).

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

40047660 is a wasteful number, since it uses less digits than its factorization.

40047660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7223 (or 7218 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 40047660 is about 6328.3220524875. The cubic root of 40047660 is about 342.1309645136.

It can be divided in two parts, 4004 and 7660, that added together give a square (11664 = 108²).

The spelling of 40047660 in words is "forty million, forty-seven thousand, six hundred sixty".