67108428 has 36 divisors (see below), whose sum is σ = 175110208. Its totient is φ = 21647520.

The previous prime is 67108387. The next prime is 67108439. The reversal of 67108428 is 82480176.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×67108428² = 9007082217262368, which contains 22 as substring.

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 = 67108392 and 67108401.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28951 + ... + 31182.

Almost surely, 2^67108428 is an apocalyptic number.

It is an amenable number.

67108428 is an abundant number, since it is smaller than the sum of its proper divisors (108001780).

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

67108428 is a wasteful number, since it uses less digits than its factorization.

67108428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60174 (or 60169 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 67108428 is about 8191.9733886287. The cubic root of 67108428 is about 406.3737892426.

The spelling of 67108428 in words is "sixty-seven million, one hundred eight thousand, four hundred twenty-eight".