402016385 has 16 divisors (see below), whose sum is σ = 491312640. Its totient is φ = 315731520.

The previous prime is 402016367. The next prime is 402016387. The reversal of 402016385 is 583610204.

It is a de Polignac number, because none of the positive numbers 2^k-402016385 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402016387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68684 + ... + 74306.

It is an arithmetic number, because the mean of its divisors is an integer number (30707040).

Almost surely, 2^402016385 is an apocalyptic number.

It is an amenable number.

402016385 is a deficient number, since it is larger than the sum of its proper divisors (89296255).

402016385 is a wasteful number, since it uses less digits than its factorization.

402016385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5888.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 402016385 is about 20050.3462563618. The cubic root of 402016385 is about 738.0422961538.

Adding to 402016385 its reverse (583610204), we get a palindrome (985626589).

The spelling of 402016385 in words is "four hundred two million, sixteen thousand, three hundred eighty-five".