67231920 has 120 divisors (see below), whose sum is σ = 242488944. Its totient is φ = 15364608.

The previous prime is 67231897. The next prime is 67231981. The reversal of 67231920 is 2913276.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8902 + ... + 14618.

Almost surely, 2^67231920 is an apocalyptic number.

67231920 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 67231920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121244472).

67231920 is an abundant number, since it is smaller than the sum of its proper divisors (175257024).

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

67231920 is a wasteful number, since it uses less digits than its factorization.

67231920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747 (or 5734 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 67231920 is about 8199.5073022713. The cubic root of 67231920 is about 406.6229043057.

The spelling of 67231920 in words is "sixty-seven million, two hundred thirty-one thousand, nine hundred twenty".