40651650 has 72 divisors (see below), whose sum is σ = 117635700. Its totient is φ = 10005120.

The previous prime is 40651643. The next prime is 40651661. The reversal of 40651650 is 5615604.

It is a happy number.

40651650 is a `hidden beast` number, since 4 + 0 + 6 + 5 + 1 + 650 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 15280281 + 25371369 = 3909^2 + 5037^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2376 + ... + 9324.

Almost surely, 2^40651650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40651650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58817850).

40651650 is an abundant number, since it is smaller than the sum of its proper divisors (76984050).

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

40651650 is a wasteful number, since it uses less digits than its factorization.

40651650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6980 (or 6972 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 40651650 is about 6375.8646472459. The cubic root of 40651650 is about 343.8423707687.

The spelling of 40651650 in words is "forty million, six hundred fifty-one thousand, six hundred fifty".