402620434 has 4 divisors (see below), whose sum is σ = 603930654. Its totient is φ = 201310216.

The previous prime is 402620429. The next prime is 402620437. The reversal of 402620434 is 434026204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 347934409 + 54686025 = 18653^2 + 7395^2 .

It is a junction number, because it is equal to n+sod(n) for n = 402620399 and 402620408.

It is not an unprimeable number, because it can be changed into a prime (402620437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100655107 + ... + 100655110.

Almost surely, 2^402620434 is an apocalyptic number.

402620434 is a deficient number, since it is larger than the sum of its proper divisors (201310220).

402620434 is a wasteful number, since it uses less digits than its factorization.

402620434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201310219.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 402620434 is about 20065.4039082197. The cubic root of 402620434 is about 738.4117592140.

Adding to 402620434 its reverse (434026204), we get a palindrome (836646638).

The spelling of 402620434 in words is "four hundred two million, six hundred twenty thousand, four hundred thirty-four".