401820002 has 4 divisors (see below), whose sum is σ = 602730006. Its totient is φ = 200910000.

The previous prime is 401819987. The next prime is 401820011. The reversal of 401820002 is 200028104.

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., 290327521 + 111492481 = 17039^2 + 10559^2 .

It is a super-2 number, since 2×401820002² = 322918628014560008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100454999 + ... + 100455002.

Almost surely, 2^401820002 is an apocalyptic number.

401820002 is a deficient number, since it is larger than the sum of its proper divisors (200910004).

401820002 is a wasteful number, since it uses less digits than its factorization.

401820002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200910003.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 401820002 is about 20045.4484110483. The cubic root of 401820002 is about 737.9220999191.

Adding to 401820002 its reverse (200028104), we get a palindrome (601848106).

The spelling of 401820002 in words is "four hundred one million, eight hundred twenty thousand, two".