40285730 has 8 divisors (see below), whose sum is σ = 72514332. Its totient is φ = 16114288.

The previous prime is 40285723. The next prime is 40285753. The reversal of 40285730 is 3758204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38725729 + 1560001 = 6223^2 + 1249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 40285693 and 40285702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2014277 + ... + 2014296.

Almost surely, 2^40285730 is an apocalyptic number.

40285730 is a deficient number, since it is larger than the sum of its proper divisors (32228602).

40285730 is a wasteful number, since it uses less digits than its factorization.

40285730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028580.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 40285730 is about 6347.1040640595. The cubic root of 40285730 is about 342.8075770775.

The spelling of 40285730 in words is "forty million, two hundred eighty-five thousand, seven hundred thirty".