67400406 has 12 divisors (see below), whose sum is σ = 146034252. Its totient is φ = 22466796.

The previous prime is 67400387. The next prime is 67400407. The reversal of 67400406 is 60400476.

It is a self number, because there is not a number n which added to its sum of digits gives 67400406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67400407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1872216 + ... + 1872251.

It is an arithmetic number, because the mean of its divisors is an integer number (12169521).

Almost surely, 2^67400406 is an apocalyptic number.

67400406 is an abundant number, since it is smaller than the sum of its proper divisors (78633846).

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

67400406 is a wasteful number, since it uses less digits than its factorization.

67400406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744475 (or 3744472 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 67400406 is about 8209.7750273683. The cubic root of 67400406 is about 406.9622922846.

The spelling of 67400406 in words is "sixty-seven million, four hundred thousand, four hundred six".