355557420 has 144 divisors (see below), whose sum is σ = 1117404288. Its totient is φ = 91445760.

The previous prime is 355557379. The next prime is 355557427. The reversal of 355557420 is 24755553.

355557420 is a `hidden beast` number, since 35 + 55 + 574 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (355557427) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1311885 + ... + 1312155.

It is an arithmetic number, because the mean of its divisors is an integer number (7759752).

Almost surely, 2^355557420 is an apocalyptic number.

355557420 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 355557420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (558702144).

355557420 is an abundant number, since it is smaller than the sum of its proper divisors (761846868).

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

355557420 is a wasteful number, since it uses less digits than its factorization.

355557420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 36.

The square root of 355557420 is about 18856.2302701256. The cubic root of 355557420 is about 708.4402844120.

The spelling of 355557420 in words is "three hundred fifty-five million, five hundred fifty-seven thousand, four hundred twenty".