67880520 has 96 divisors (see below), whose sum is σ = 222201720. Its totient is φ = 17971200.

The previous prime is 67880509. The next prime is 67880537. The reversal of 67880520 is 2508876.

It can be written as a sum of positive squares in 4 ways, for example, as 23444964 + 44435556 = 4842^2 + 6666^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55920 + ... + 57120.

Almost surely, 2^67880520 is an apocalyptic number.

67880520 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 67880520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111100860).

67880520 is an abundant number, since it is smaller than the sum of its proper divisors (154321200).

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

67880520 is a wasteful number, since it uses less digits than its factorization.

67880520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375 (or 1368 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 67880520 is about 8238.9635270463. The cubic root of 67880520 is about 407.9263131055.

The spelling of 67880520 in words is "sixty-seven million, eight hundred eighty thousand, five hundred twenty".