67147920 has 160 divisors (see below), whose sum is σ = 264387840. Its totient is φ = 15344640.

The previous prime is 67147907. The next prime is 67147921. The reversal of 67147920 is 2974176.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (67147921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12900 + ... + 17340.

It is an arithmetic number, because the mean of its divisors is an integer number (1652424).

Almost surely, 2^67147920 is an apocalyptic number.

67147920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67147920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132193920).

67147920 is an abundant number, since it is smaller than the sum of its proper divisors (197239920).

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

67147920 is a wasteful number, since it uses less digits than its factorization.

67147920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4470 (or 4458 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 67147920 is about 8194.3834423341. The cubic root of 67147920 is about 406.4534879586.

The spelling of 67147920 in words is "sixty-seven million, one hundred forty-seven thousand, nine hundred twenty".