67129428 has 24 divisors (see below), whose sum is σ = 157252032. Its totient is φ = 22288384.

The previous prime is 67129427. The next prime is 67129457. The reversal of 67129428 is 82492176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67129421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7800 + ... + 13967.

It is an arithmetic number, because the mean of its divisors is an integer number (6552168).

Almost surely, 2^67129428 is an apocalyptic number.

It is an amenable number.

67129428 is an abundant number, since it is smaller than the sum of its proper divisors (90122604).

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

67129428 is a wasteful number, since it uses less digits than its factorization.

67129428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22031 (or 22029 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 67129428 is about 8193.2550308165. The cubic root of 67129428 is about 406.4161731866.

The spelling of 67129428 in words is "sixty-seven million, one hundred twenty-nine thousand, four hundred twenty-eight".