67390420 has 24 divisors (see below), whose sum is σ = 142345224. Its totient is φ = 26798976.

The previous prime is 67390399. The next prime is 67390423. The reversal of 67390420 is 2409376.

It can be written as a sum of positive squares in 4 ways, for example, as 26071236 + 41319184 = 5106^2 + 6428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67390423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6279 + ... + 13198.

It is an arithmetic number, because the mean of its divisors is an integer number (5931051).

Almost surely, 2^67390420 is an apocalyptic number.

It is an amenable number.

67390420 is an abundant number, since it is smaller than the sum of its proper divisors (74954804).

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

67390420 is a wasteful number, since it uses less digits than its factorization.

67390420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19659 (or 19657 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 67390420 is about 8209.1668273948. The cubic root of 67390420 is about 406.9421928697.

Adding to 67390420 its reverse (2409376), we get a palindrome (69799796).

The spelling of 67390420 in words is "sixty-seven million, three hundred ninety thousand, four hundred twenty".