3420857394 has 64 divisors (see below), whose sum is σ = 8060745600. Its totient is φ = 1072341504.

The previous prime is 3420857383. The next prime is 3420857399. The reversal of 3420857394 is 4937580243.

3420857394 is a `hidden beast` number, since 3 + 4 + 208 + 57 + 394 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3420857399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128394 + ... + 152730.

It is an arithmetic number, because the mean of its divisors is an integer number (125949150).

Almost surely, 2^3420857394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3420857394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4030372800).

3420857394 is an abundant number, since it is smaller than the sum of its proper divisors (4639888206).

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

3420857394 is a wasteful number, since it uses less digits than its factorization.

3420857394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24504 (or 24498 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 3420857394 is about 58488.0961734950. The cubic root of 3420857394 is about 1506.7631487170.

The spelling of 3420857394 in words is "three billion, four hundred twenty million, eight hundred fifty-seven thousand, three hundred ninety-four".