39879420 has 48 divisors (see below), whose sum is σ = 127615488. Its totient is φ = 9115200.

The previous prime is 39879419. The next prime is 39879431. The reversal of 39879420 is 2497893.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 47056 + ... + 47895.

It is an arithmetic number, because the mean of its divisors is an integer number (2658656).

Almost surely, 2^39879420 is an apocalyptic number.

39879420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39879420 is an abundant number, since it is smaller than the sum of its proper divisors (87736068).

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

39879420 is a wasteful number, since it uses less digits than its factorization.

39879420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94970 (or 94968 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 39879420 is about 6315.0154394111. The cubic root of 39879420 is about 341.6511952807.

The spelling of 39879420 in words is "thirty-nine million, eight hundred seventy-nine thousand, four hundred twenty".