67820790 has 64 divisors (see below), whose sum is σ = 170989056. Its totient is φ = 17183232.

The previous prime is 67820783. The next prime is 67820801. The reversal of 67820790 is 9702876.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156414 + ... + 156846.

It is an arithmetic number, because the mean of its divisors is an integer number (2671704).

Almost surely, 2^67820790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67820790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85494528).

67820790 is an abundant number, since it is smaller than the sum of its proper divisors (103168266).

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

67820790 is a wasteful number, since it uses less digits than its factorization.

67820790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 67820790 is about 8235.3378801358. The cubic root of 67820790 is about 407.8066293396.

The spelling of 67820790 in words is "sixty-seven million, eight hundred twenty thousand, seven hundred ninety".