67897440 has 360 divisors, whose sum is σ = 267841728. Its totient is φ = 16174080.

The previous prime is 67897421. The next prime is 67897441. The reversal of 67897440 is 4479876.

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×67897440² = 9220124717107200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67897441) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2190225 + ... + 2190255.

Almost surely, 2^67897440 is an apocalyptic number.

67897440 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 67897440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133920864).

67897440 is an abundant number, since it is smaller than the sum of its proper divisors (199944288).

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

67897440 is a wasteful number, since it uses less digits than its factorization.

67897440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 67897440 is about 8239.9902912564. The cubic root of 67897440 is about 407.9602037309.

The spelling of 67897440 in words is "sixty-seven million, eight hundred ninety-seven thousand, four hundred forty".