351702020 has 24 divisors (see below), whose sum is σ = 758537304. Its totient is φ = 136878336.

The previous prime is 351701981. The next prime is 351702023. The reversal of 351702020 is 20207153.

It can be written as a sum of positive squares in 4 ways, for example, as 30647296 + 321054724 = 5536^2 + 17918^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 351701983 and 351702001.

It is not an unprimeable number, because it can be changed into a prime (351702023) 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, 236897 + ... + 238376.

It is an arithmetic number, because the mean of its divisors is an integer number (31605721).

Almost surely, 2^351702020 is an apocalyptic number.

It is an amenable number.

351702020 is an abundant number, since it is smaller than the sum of its proper divisors (406835284).

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

351702020 is a wasteful number, since it uses less digits than its factorization.

351702020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475319 (or 475317 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 351702020 is about 18753.7201642767. The cubic root of 351702020 is about 705.8703734704.

Adding to 351702020 its reverse (20207153), we get a palindrome (371909173).

The spelling of 351702020 in words is "three hundred fifty-one million, seven hundred two thousand, twenty".