64880040 has 64 divisors (see below), whose sum is σ = 199402560. Its totient is φ = 16878080.

The previous prime is 64879963. The next prime is 64880059. The reversal of 64880040 is 4008846.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1674 + ... + 11513.

It is an arithmetic number, because the mean of its divisors is an integer number (3115665).

Almost surely, 2^64880040 is an apocalyptic number.

64880040 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 64880040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99701280).

64880040 is an abundant number, since it is smaller than the sum of its proper divisors (134522520).

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

64880040 is a wasteful number, since it uses less digits than its factorization.

64880040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13242 (or 13238 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 64880040 is about 8054.8147092283. The cubic root of 64880040 is about 401.8250767390.

Adding to 64880040 its reverse (4008846), we get a palindrome (68888886).

The spelling of 64880040 in words is "sixty-four million, eight hundred eighty thousand, forty".