40689715 has 8 divisors (see below), whose sum is σ = 53266608. Its totient is φ = 29592480.

The previous prime is 40689713. The next prime is 40689757. The reversal of 40689715 is 51798604.

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

It is not a de Polignac number, because 40689715 - 2¹ = 40689713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40689713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369852 + ... + 369961.

It is an arithmetic number, because the mean of its divisors is an integer number (6658326).

Almost surely, 2^40689715 is an apocalyptic number.

40689715 is a deficient number, since it is larger than the sum of its proper divisors (12576893).

40689715 is a wasteful number, since it uses less digits than its factorization.

40689715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739829.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 40689715 is about 6378.8490341127. The cubic root of 40689715 is about 343.9496585563.

Subtracting 40689715 from its reverse (51798604), we obtain a square (11108889 = 3333²).

The spelling of 40689715 in words is "forty million, six hundred eighty-nine thousand, seven hundred fifteen".