39900742 has 16 divisors (see below), whose sum is σ = 68654880. Its totient is φ = 17036928.

The previous prime is 39900739. The next prime is 39900743. The reversal of 39900742 is 24700993.

It is a junction number, because it is equal to n+sod(n) for n = 39900698 and 39900707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39900743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1267 + ... + 9022.

It is an arithmetic number, because the mean of its divisors is an integer number (4290930).

Almost surely, 2^39900742 is an apocalyptic number.

39900742 is a deficient number, since it is larger than the sum of its proper divisors (28754138).

39900742 is a wasteful number, since it uses less digits than its factorization.

39900742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10575.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 39900742 is about 6316.7034123821. The cubic root of 39900742 is about 341.7120737061.

The spelling of 39900742 in words is "thirty-nine million, nine hundred thousand, seven hundred forty-two".