67491072 has 108 divisors (see below), whose sum is σ = 212363424. Its totient is φ = 20444160.

The previous prime is 67491041. The next prime is 67491079. The reversal of 67491072 is 27019476.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67491079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24013 + ... + 26675.

It is an arithmetic number, because the mean of its divisors is an integer number (1966328).

Almost surely, 2^67491072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67491072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106181712).

67491072 is an abundant number, since it is smaller than the sum of its proper divisors (144872352).

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

67491072 is a wasteful number, since it uses less digits than its factorization.

67491072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696 (or 2679 counting only the distinct ones).

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

The square root of 67491072 is about 8215.2950038328. The cubic root of 67491072 is about 407.1446903492.

The spelling of 67491072 in words is "sixty-seven million, four hundred ninety-one thousand, seventy-two".