67312540 has 24 divisors (see below), whose sum is σ = 142474752. Its totient is φ = 26712000.

The previous prime is 67312519. The next prime is 67312547. The reversal of 67312540 is 4521376.

It is a junction number, because it is equal to n+sod(n) for n = 67312499 and 67312508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67312547) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10711 + ... + 15790.

It is an arithmetic number, because the mean of its divisors is an integer number (5936448).

Almost surely, 2^67312540 is an apocalyptic number.

It is an amenable number.

67312540 is an abundant number, since it is smaller than the sum of its proper divisors (75162212).

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

67312540 is a wasteful number, since it uses less digits than its factorization.

67312540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26637 (or 26635 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 67312540 is about 8204.4219784211. The cubic root of 67312540 is about 406.7853710029.

The spelling of 67312540 in words is "sixty-seven million, three hundred twelve thousand, five hundred forty".