39954840 has 64 divisors (see below), whose sum is σ = 120463200. Its totient is φ = 10601472.

The previous prime is 39954829. The next prime is 39954881. The reversal of 39954840 is 4845993.

It is a junction number, because it is equal to n+sod(n) for n = 39954792 and 39954801.

It is a congruent number.

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, 27246 + ... + 28674.

Almost surely, 2^39954840 is an apocalyptic number.

39954840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39954840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60231600).

39954840 is an abundant number, since it is smaller than the sum of its proper divisors (80508360).

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

39954840 is a wasteful number, since it uses less digits than its factorization.

39954840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 39954840 is about 6320.9841005970. The cubic root of 39954840 is about 341.8664366797.

The spelling of 39954840 in words is "thirty-nine million, nine hundred fifty-four thousand, eight hundred forty".