648430 has 16 divisors (see below), whose sum is σ = 1187424. Its totient is φ = 254880.

The previous prime is 648391. The next prime is 648433. The reversal of 648430 is 34846.

It is a super-2 number, since 2×648430² = 840922929800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 648395 and 648404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79 + ... + 1141.

It is an arithmetic number, because the mean of its divisors is an integer number (74214).

2⁶⁴⁸⁴³⁰ is an apocalyptic number.

648430 is a deficient number, since it is larger than the sum of its proper divisors (538994).

648430 is a wasteful number, since it uses less digits than its factorization.

648430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 648430 is about 805.2515135037. The cubic root of 648430 is about 86.5541109527.

The spelling of 648430 in words is "six hundred forty-eight thousand, four hundred thirty".