402020465 has 16 divisors (see below), whose sum is σ = 601464960. Its totient is φ = 250609920.

The previous prime is 402020441. The next prime is 402020467. The reversal of 402020465 is 564020204.

It is not a de Polignac number, because 402020465 - 2¹⁶ = 401954929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402020465.

It is not an unprimeable number, because it can be changed into a prime (402020467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521720 + ... + 522489.

It is an arithmetic number, because the mean of its divisors is an integer number (37591560).

Almost surely, 2^402020465 is an apocalyptic number.

It is an amenable number.

402020465 is a deficient number, since it is larger than the sum of its proper divisors (199444495).

402020465 is a wasteful number, since it uses less digits than its factorization.

402020465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044232.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 402020465 is about 20050.4479999824. The cubic root of 402020465 is about 738.0447929031.

Adding to 402020465 its reverse (564020204), we get a palindrome (966040669).

The spelling of 402020465 in words is "four hundred two million, twenty thousand, four hundred sixty-five".