67419540 has 60 divisors (see below), whose sum is σ = 211502676. Its totient is φ = 17978112.

The previous prime is 67419503. The next prime is 67419553. The reversal of 67419540 is 4591476.

It can be written as a sum of positive squares in 2 ways, for example, as 53670276 + 13749264 = 7326^2 + 3708^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a junction number, because it is equal to n+sod(n) for n = 67419495 and 67419504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19189 + ... + 22428.

Almost surely, 2^67419540 is an apocalyptic number.

67419540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67419540 is an abundant number, since it is smaller than the sum of its proper divisors (144083136).

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

67419540 is a wasteful number, since it uses less digits than its factorization.

67419540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41638 (or 41627 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 67419540 is about 8210.9402628444. The cubic root of 67419540 is about 407.0007988764. Note that the first 3 decimals are identical.

The spelling of 67419540 in words is "sixty-seven million, four hundred nineteen thousand, five hundred forty".