40661740 has 24 divisors (see below), whose sum is σ = 97588512. Its totient is φ = 13941120.

The previous prime is 40661713. The next prime is 40661743. The reversal of 40661740 is 4716604.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 40661699 and 40661708.

It is not an unprimeable number, because it can be changed into a prime (40661743) 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, 145081 + ... + 145360.

It is an arithmetic number, because the mean of its divisors is an integer number (4066188).

Almost surely, 2^40661740 is an apocalyptic number.

It is an amenable number.

40661740 is an abundant number, since it is smaller than the sum of its proper divisors (56926772).

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

40661740 is a wasteful number, since it uses less digits than its factorization.

40661740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290457 (or 290455 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 40661740 is about 6376.6558633817. The cubic root of 40661740 is about 343.8708163752.

The spelling of 40661740 in words is "forty million, six hundred sixty-one thousand, seven hundred forty".