40661530 has 32 divisors (see below), whose sum is σ = 90082944. Its totient is φ = 12868416.

The previous prime is 40661521. The next prime is 40661573. The reversal of 40661530 is 3516604.

It is a junction number, because it is equal to n+sod(n) for n = 40661495 and 40661504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21432 + ... + 23251.

It is an arithmetic number, because the mean of its divisors is an integer number (2815092).

Almost surely, 2^40661530 is an apocalyptic number.

40661530 is an abundant number, since it is smaller than the sum of its proper divisors (49421414).

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

40661530 is a wasteful number, since it uses less digits than its factorization.

40661530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44710.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 40661530 is about 6376.6393970492. The cubic root of 40661530 is about 343.8702243937.

The spelling of 40661530 in words is "forty million, six hundred sixty-one thousand, five hundred thirty".