67988520 has 48 divisors (see below), whose sum is σ = 220963860. Its totient is φ = 18130176.

The previous prime is 67988519. The next prime is 67988521. The reversal of 67988520 is 2588976.

It is an interprime number because it is at equal distance from previous prime (67988519) and next prime (67988521).

It can be written as a sum of positive squares in 2 ways, for example, as 67272804 + 715716 = 8202^2 + 846^2 .

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

It is not an unprimeable number, because it can be changed into a prime (67988521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94069 + ... + 94788.

Almost surely, 2^67988520 is an apocalyptic number.

67988520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67988520 is an abundant number, since it is smaller than the sum of its proper divisors (152975340).

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

67988520 is a wasteful number, since it uses less digits than its factorization.

67988520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188874 (or 188867 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 67988520 is about 8245.5151446104. The cubic root of 67988520 is about 408.1425395850.

The spelling of 67988520 in words is "sixty-seven million, nine hundred eighty-eight thousand, five hundred twenty".