68620428 has 18 divisors (see below), whose sum is σ = 173457284. Its totient is φ = 22873464.

The previous prime is 68620421. The next prime is 68620439. The reversal of 68620428 is 82402686.

68620428 is a `hidden beast` number, since 6 + 8 + 620 + 4 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1906123 = 68620428 / (6 + 8 + 6 + 2 + 0 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 68620392 and 68620401.

It is not an unprimeable number, because it can be changed into a prime (68620421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 953026 + ... + 953097.

Almost surely, 2^68620428 is an apocalyptic number.

It is an amenable number.

68620428 is an abundant number, since it is smaller than the sum of its proper divisors (104836856).

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

68620428 is a wasteful number, since it uses less digits than its factorization.

68620428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906133 (or 1906128 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 68620428 is about 8283.7448053402. The cubic root of 68620428 is about 409.4031132180.

The spelling of 68620428 in words is "sixty-eight million, six hundred twenty thousand, four hundred twenty-eight".