64402 has 8 divisors (see below), whose sum is σ = 104076. Its totient is φ = 29712.

The previous prime is 64399. The next prime is 64403. The reversal of 64402 is 20446.

It can be written as a sum of positive squares in 2 ways, for example, as 62001 + 2401 = 249^2 + 49^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (64403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1213 + ... + 1264.

2⁶⁴⁴⁰² is an apocalyptic number.

64402 is a deficient number, since it is larger than the sum of its proper divisors (39674).

64402 is a wasteful number, since it uses less digits than its factorization.

64402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 64402 is about 253.7754913304. The cubic root of 64402 is about 40.0835752578.

Adding to 64402 its reverse (20446), we get a palindrome (84848).

Subtracting from 64402 its reverse (20446), we obtain a triangular number (43956 = T₂₉₆).

It can be divided in two parts, 6440 and 2, that multiplied together give a triangular number (12880 = T₁₆₀).

The spelling of 64402 in words is "sixty-four thousand, four hundred two".