402620402 has 4 divisors (see below), whose sum is σ = 603930606. Its totient is φ = 201310200.

The previous prime is 402620399. The next prime is 402620423. The reversal of 402620402 is 204026204.

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., 291760561 + 110859841 = 17081^2 + 10529^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100655099 + ... + 100655102.

Almost surely, 2^402620402 is an apocalyptic number.

402620402 is a deficient number, since it is larger than the sum of its proper divisors (201310204).

402620402 is a wasteful number, since it uses less digits than its factorization.

402620402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201310203.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 402620402 is about 20065.4031108274. The cubic root of 402620402 is about 738.4117396512.

Adding to 402620402 its reverse (204026204), we get a palindrome (606646606).

The spelling of 402620402 in words is "four hundred two million, six hundred twenty thousand, four hundred two".