39881946 has 32 divisors (see below), whose sum is σ = 86381568. Its totient is φ = 12202560.

The previous prime is 39881939. The next prime is 39881957. The reversal of 39881946 is 64918893.

It is a junction number, because it is equal to n+sod(n) for n = 39881895 and 39881904.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13560 + ... + 16236.

It is an arithmetic number, because the mean of its divisors is an integer number (2699424).

Almost surely, 2^39881946 is an apocalyptic number.

39881946 is an abundant number, since it is smaller than the sum of its proper divisors (46499622).

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

39881946 is a wasteful number, since it uses less digits than its factorization.

39881946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886.

The product of its digits is 373248, while the sum is 48.

The square root of 39881946 is about 6315.2154357551. The cubic root of 39881946 is about 341.6584086311.

The spelling of 39881946 in words is "thirty-nine million, eight hundred eighty-one thousand, nine hundred forty-six".