67520420 has 36 divisors (see below), whose sum is σ = 155860572. Its totient is φ = 24552000.

The previous prime is 67520353. The next prime is 67520423. The reversal of 67520420 is 2402576.

It can be written as a sum of positive squares in 2 ways, for example, as 44729344 + 22791076 = 6688^2 + 4774^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 67520420.

It is not an unprimeable number, because it can be changed into a prime (67520423) 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, 11531 + ... + 16370.

Almost surely, 2^67520420 is an apocalyptic number.

It is an amenable number.

67520420 is an abundant number, since it is smaller than the sum of its proper divisors (88340152).

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

67520420 is a wasteful number, since it uses less digits than its factorization.

67520420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27932 (or 27919 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 67520420 is about 8217.0809902300. The cubic root of 67520420 is about 407.2036964295.

Adding to 67520420 its reverse (2402576), we get a palindrome (69922996).

The spelling of 67520420 in words is "sixty-seven million, five hundred twenty thousand, four hundred twenty".