74447472 has 160 divisors (see below), whose sum is σ = 227485440. Its totient is φ = 20736000.

The previous prime is 74447447. The next prime is 74447537. The reversal of 74447472 is 27474447.

It is a self number, because there is not a number n which added to its sum of digits gives 74447472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 411222 + ... + 411402.

It is an arithmetic number, because the mean of its divisors is an integer number (1421784).

Almost surely, 2^74447472 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 74447472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113742720).

74447472 is an abundant number, since it is smaller than the sum of its proper divisors (153037968).

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

74447472 is a wasteful number, since it uses less digits than its factorization.

74447472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 257 counting only the distinct ones).

The product of its digits is 175616, while the sum is 39.

The square root of 74447472 is about 8628.2948489258. The cubic root of 74447472 is about 420.6781787242.

The spelling of 74447472 in words is "seventy-four million, four hundred forty-seven thousand, four hundred seventy-two".