67864840 has 32 divisors (see below), whose sum is σ = 156423960. Its totient is φ = 26483200.

The previous prime is 67864813. The next prime is 67864873. The reversal of 67864840 is 4846876.

It can be written as a sum of positive squares in 4 ways, for example, as 39413284 + 28451556 = 6278^2 + 5334^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19051 + ... + 22330.

Almost surely, 2^67864840 is an apocalyptic number.

It is an amenable number.

67864840 is an abundant number, since it is smaller than the sum of its proper divisors (88559120).

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

67864840 is a wasteful number, since it uses less digits than its factorization.

67864840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41433 (or 41429 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 67864840 is about 8238.0118960827. The cubic root of 67864840 is about 407.8949011621.

The spelling of 67864840 in words is "sixty-seven million, eight hundred sixty-four thousand, eight hundred forty".