40307706 has 20 divisors (see below), whose sum is σ = 90319482. Its totient is φ = 13435848.

The previous prime is 40307699. The next prime is 40307737. The reversal of 40307706 is 60770304.

It can be written as a sum of positive squares in only one way, i.e., 39576681 + 731025 = 6291^2 + 855^2 .

It is a super-2 number, since 2×40307706² = 3249422325964872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 40307706.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 124245 + ... + 124568.

Almost surely, 2^40307706 is an apocalyptic number.

40307706 is an abundant number, since it is smaller than the sum of its proper divisors (50011776).

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

40307706 is a wasteful number, since it uses less digits than its factorization.

40307706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248827 (or 248818 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 40307706 is about 6348.8350112442. The cubic root of 40307706 is about 342.8698999718.

The spelling of 40307706 in words is "forty million, three hundred seven thousand, seven hundred six".