67969820 has 12 divisors (see below), whose sum is σ = 142736664. Its totient is φ = 27187920.

The previous prime is 67969819. The next prime is 67969831. The reversal of 67969820 is 2896976.

67969820 = 1284² + 1285² + ... + 1323².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1699226 + ... + 1699265.

It is an arithmetic number, because the mean of its divisors is an integer number (11894722).

Almost surely, 2^67969820 is an apocalyptic number.

It is an amenable number.

67969820 is an abundant number, since it is smaller than the sum of its proper divisors (74766844).

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

67969820 is a wasteful number, since it uses less digits than its factorization.

67969820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398500 (or 3398498 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 67969820 is about 8244.3811168577. The cubic root of 67969820 is about 408.1051167704.

The spelling of 67969820 in words is "sixty-seven million, nine hundred sixty-nine thousand, eight hundred twenty".