939666420 has 480 divisors, whose sum is σ = 3809304576. Its totient is φ = 188956800.

The previous prime is 939666419. The next prime is 939666443. The reversal of 939666420 is 24666939.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 30311805 + ... + 30311835.

Almost surely, 2^939666420 is an apocalyptic number.

939666420 is a gapful number since it is divisible by the number (90) 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 939666420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904652288).

939666420 is an abundant number, since it is smaller than the sum of its proper divisors (2869638156).

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

939666420 is a wasteful number, since it uses less digits than its factorization.

939666420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 939666420 is about 30653.9788608265. The cubic root of 939666420 is about 979.4702190008.

The spelling of 939666420 in words is "nine hundred thirty-nine million, six hundred sixty-six thousand, four hundred twenty".