40069730 has 32 divisors (see below), whose sum is σ = 73770480. Its totient is φ = 15667200.

The previous prime is 40069721. The next prime is 40069739. The reversal of 40069730 is 3796004.

It is an interprime number because it is at equal distance from previous prime (40069721) and next prime (40069739).

It can be written as a sum of positive squares in 8 ways, for example, as 35485849 + 4583881 = 5957^2 + 2141^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40069693 and 40069702.

It is not an unprimeable number, because it can be changed into a prime (40069739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97766 + ... + 98174.

Almost surely, 2^40069730 is an apocalyptic number.

40069730 is a deficient number, since it is larger than the sum of its proper divisors (33700750).

40069730 is a wasteful number, since it uses less digits than its factorization.

40069730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 40069730 is about 6330.0655604820. The cubic root of 40069730 is about 342.1938016743.

The spelling of 40069730 in words is "forty million, sixty-nine thousand, seven hundred thirty".