402389613 has 10 divisors (see below), whose sum is σ = 601100654. Its totient is φ = 268259688.

The previous prime is 402389591. The next prime is 402389627. The reversal of 402389613 is 316983204.

402389613 is a `hidden beast` number, since 4 + 0 + 2 + 38 + 9 + 613 = 666.

It can be written as a sum of positive squares in only one way, i.e., 228070404 + 174319209 = 15102^2 + 13203^2 .

It is not a de Polignac number, because 402389613 - 2¹² = 402385517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402389633) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2483806 + ... + 2483967.

Almost surely, 2^402389613 is an apocalyptic number.

It is an amenable number.

402389613 is a deficient number, since it is larger than the sum of its proper divisors (198711041).

402389613 is an equidigital number, since it uses as much as digits as its factorization.

402389613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967785 (or 4967776 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 402389613 is about 20059.6513678578. The cubic root of 402389613 is about 738.2706225439.

It can be divided in two parts, 4023 and 89613, that added together give a square (93636 = 306²).

The spelling of 402389613 in words is "four hundred two million, three hundred eighty-nine thousand, six hundred thirteen".