67740028 has 6 divisors (see below), whose sum is σ = 118545056. Its totient is φ = 33870012.

The previous prime is 67740017. The next prime is 67740059. The reversal of 67740028 is 82004776.

It is a super-2 number, since 2×67740028² = 9177422786881568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 67739975 and 67740002.

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 as a sum of consecutive naturals, namely, 8467500 + ... + 8467507.

Almost surely, 2^67740028 is an apocalyptic number.

It is an amenable number.

67740028 is a deficient number, since it is larger than the sum of its proper divisors (50805028).

67740028 is a wasteful number, since it uses less digits than its factorization.

67740028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16935011 (or 16935009 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 67740028 is about 8230.4330384251. The cubic root of 67740028 is about 407.6446909874.

The spelling of 67740028 in words is "sixty-seven million, seven hundred forty thousand, twenty-eight".