7904212420 has 96 divisors (see below), whose sum is σ = 18859841280. Its totient is φ = 2758510080.

The previous prime is 7904212367. The next prime is 7904212457. The reversal of 7904212420 is 242124097.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2483230 + ... + 2486410.

It is an arithmetic number, because the mean of its divisors is an integer number (196456680).

Almost surely, 2^7904212420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7904212420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9429920640).

7904212420 is an abundant number, since it is smaller than the sum of its proper divisors (10955628860).

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

7904212420 is a wasteful number, since it uses less digits than its factorization.

7904212420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3725 (or 3723 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 7904212420 is about 88905.6377289989. The cubic root of 7904212420 is about 1991.9856294964.

The spelling of 7904212420 in words is "seven billion, nine hundred four million, two hundred twelve thousand, four hundred twenty".