39845142 has 16 divisors (see below), whose sum is σ = 88544880. Its totient is φ = 13281696.

The previous prime is 39845123. The next prime is 39845149. The reversal of 39845142 is 24154893.

It is a junction number, because it is equal to n+sod(n) for n = 39845097 and 39845106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39845149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368883 + ... + 368990.

It is an arithmetic number, because the mean of its divisors is an integer number (5534055).

Almost surely, 2^39845142 is an apocalyptic number.

39845142 is an abundant number, since it is smaller than the sum of its proper divisors (48699738).

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

39845142 is a wasteful number, since it uses less digits than its factorization.

39845142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737884 (or 737878 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 39845142 is about 6312.3008483437. The cubic root of 39845142 is about 341.5532794745.

The spelling of 39845142 in words is "thirty-nine million, eight hundred forty-five thousand, one hundred forty-two".