39807742 has 16 divisors (see below), whose sum is σ = 65031120. Its totient is φ = 18165312.

The previous prime is 39807739. The next prime is 39807767. The reversal of 39807742 is 24770893.

It is a junction number, because it is equal to n+sod(n) for n = 39807695 and 39807704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6288 + ... + 10915.

It is an arithmetic number, because the mean of its divisors is an integer number (4064445).

Almost surely, 2^39807742 is an apocalyptic number.

39807742 is a deficient number, since it is larger than the sum of its proper divisors (25223378).

39807742 is a wasteful number, since it uses less digits than its factorization.

39807742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17307.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 39807742 is about 6309.3376831487. The cubic root of 39807742 is about 341.4463815289.

The spelling of 39807742 in words is "thirty-nine million, eight hundred seven thousand, seven hundred forty-two".