67400452 has 12 divisors (see below), whose sum is σ = 134800960. Its totient is φ = 28885896.

The previous prime is 67400447. The next prime is 67400453. The reversal of 67400452 is 25400476.

67400452 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 2407159 = 67400452 / (6 + 7 + 4 + 0 + 0 + 4 + 5 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 67400452.

It is not an unprimeable number, because it can be changed into a prime (67400453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203552 + ... + 1203607.

Almost surely, 2^67400452 is an apocalyptic number.

It is an amenable number.

67400452 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

67400452 is a wasteful number, since it uses less digits than its factorization.

67400452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407170 (or 2407168 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 67400452 is about 8209.7778289062. Note that the first 3 decimals coincide. The cubic root of 67400452 is about 406.9623848669.

The spelling of 67400452 in words is "sixty-seven million, four hundred thousand, four hundred fifty-two".