649754280 has 384 divisors, whose sum is σ = 2648505600. Its totient is φ = 134701056.

The previous prime is 649754269. The next prime is 649754293. The reversal of 649754280 is 82457946.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1242099 + ... + 1242621.

It is an arithmetic number, because the mean of its divisors is an integer number (6897150).

Almost surely, 2^649754280 is an apocalyptic number.

649754280 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 649754280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324252800).

649754280 is an abundant number, since it is smaller than the sum of its proper divisors (1998751320).

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

649754280 is a wasteful number, since it uses less digits than its factorization.

649754280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 649754280 is about 25490.2781467759. The cubic root of 649754280 is about 866.1299365716.

The spelling of 649754280 in words is "six hundred forty-nine million, seven hundred fifty-four thousand, two hundred eighty".