355420240 has 40 divisors (see below), whose sum is σ = 944403840. Its totient is φ = 121858176.

The previous prime is 355420237. The next prime is 355420243. The reversal of 355420240 is 42024553.

It is an interprime number because it is at equal distance from previous prime (355420237) and next prime (355420243).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355420243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316780 + ... + 317899.

It is an arithmetic number, because the mean of its divisors is an integer number (23610096).

Almost surely, 2^355420240 is an apocalyptic number.

It is an amenable number.

355420240 is an abundant number, since it is smaller than the sum of its proper divisors (588983600).

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

355420240 is a wasteful number, since it uses less digits than its factorization.

355420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634699 (or 634693 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 355420240 is about 18852.5923946814. The cubic root of 355420240 is about 708.3491633217.

Adding to 355420240 its reverse (42024553), we get a palindrome (397444793).

The spelling of 355420240 in words is "three hundred fifty-five million, four hundred twenty thousand, two hundred forty".