64280040 has 192 divisors, whose sum is σ = 224078400. Its totient is φ = 14699520.

The previous prime is 64280023. The next prime is 64280089. The reversal of 64280040 is 4008246.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 275764 + ... + 275996.

It is an arithmetic number, because the mean of its divisors is an integer number (1167075).

Almost surely, 2^64280040 is an apocalyptic number.

64280040 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 64280040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112039200).

64280040 is an abundant number, since it is smaller than the sum of its proper divisors (159798360).

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

64280040 is a wasteful number, since it uses less digits than its factorization.

64280040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 273 counting only the distinct ones).

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

The square root of 64280040 is about 8017.4833956797. The cubic root of 64280040 is about 400.5825677917.

Adding to 64280040 its reverse (4008246), we get a palindrome (68288286).

The spelling of 64280040 in words is "sixty-four million, two hundred eighty thousand, forty".