350402405 has 4 divisors (see below), whose sum is σ = 420482892. Its totient is φ = 280321920.

The previous prime is 350402387. The next prime is 350402407. The reversal of 350402405 is 504204053.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504204053 = 241 ⋅2092133.

It can be written as a sum of positive squares in 2 ways, for example, as 125462401 + 224940004 = 11201^2 + 14998^2 .

It is not a de Polignac number, because 350402405 - 2¹² = 350398309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350402407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35040236 + ... + 35040245.

It is an arithmetic number, because the mean of its divisors is an integer number (105120723).

Almost surely, 2^350402405 is an apocalyptic number.

It is an amenable number.

350402405 is a deficient number, since it is larger than the sum of its proper divisors (70080487).

350402405 is an equidigital number, since it uses as much as digits as its factorization.

350402405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70080486.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 350402405 is about 18719.0385703967. The cubic root of 350402405 is about 704.9998524554. Note that the first 3 decimals are identical.

Adding to 350402405 its reverse (504204053), we get a palindrome (854606458).

The spelling of 350402405 in words is "three hundred fifty million, four hundred two thousand, four hundred five".