649380 has 48 divisors (see below), whose sum is σ = 1854720. Its totient is φ = 169728.

The previous prime is 649379. The next prime is 649381. The reversal of 649380 is 83946.

It is an interprime number because it is at equal distance from previous prime (649379) and next prime (649381).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (649381) 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, 4672 + ... + 4808.

It is an arithmetic number, because the mean of its divisors is an integer number (38640).

2⁶⁴⁹³⁸⁰ is an apocalyptic number.

649380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (927360).

649380 is an abundant number, since it is smaller than the sum of its proper divisors (1205340).

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

649380 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 649380 = (403986)₁₁.

649380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 649380 is about 805.8411754186. The cubic root of 649380 is about 86.5963598112.

The spelling of 649380 in words is "six hundred forty-nine thousand, three hundred eighty".