67243440 has 80 divisors (see below), whose sum is σ = 227414016. Its totient is φ = 16300800.

The previous prime is 67243427. The next prime is 67243453. The reversal of 67243440 is 4434276.

It is an interprime number because it is at equal distance from previous prime (67243427) and next prime (67243453).

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a junction number, because it is equal to n+sod(n) for n = 67243398 and 67243407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10096 + ... + 15375.

Almost surely, 2^67243440 is an apocalyptic number.

67243440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67243440 is an abundant number, since it is smaller than the sum of its proper divisors (160170576).

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

67243440 is a wasteful number, since it uses less digits than its factorization.

67243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25498 (or 25492 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 67243440 is about 8200.2097534148. The cubic root of 67243440 is about 406.6461275422.

The spelling of 67243440 in words is "sixty-seven million, two hundred forty-three thousand, four hundred forty".