402648 has 32 divisors (see below), whose sum is σ = 1060800. Its totient is φ = 127008.

The previous prime is 402631. The next prime is 402691. The reversal of 402648 is 846204.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15 + ... + 897.

It is an arithmetic number, because the mean of its divisors is an integer number (33150).

2⁴⁰²⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (530400).

402648 is an abundant number, since it is smaller than the sum of its proper divisors (658152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402648 is a wasteful number, since it uses less digits than its factorization.

402648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 402648 is about 634.5455066424. The cubic root of 402648 is about 73.8428610978.

Subtracting 402648 from its reverse (846204), we obtain a square (443556 = 666²).

The spelling of 402648 in words is "four hundred two thousand, six hundred forty-eight".