74556478 has 24 divisors (see below), whose sum is σ = 119146608. Its totient is φ = 34924032.

The previous prime is 74556473. The next prime is 74556481. The reversal of 74556478 is 87465547.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74556473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128926 + ... + 129502.

It is an arithmetic number, because the mean of its divisors is an integer number (4964442).

Almost surely, 2^74556478 is an apocalyptic number.

74556478 is a deficient number, since it is larger than the sum of its proper divisors (44590130).

74556478 is a wasteful number, since it uses less digits than its factorization.

74556478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708 (or 655 counting only the distinct ones).

The product of its digits is 940800, while the sum is 46.

The square root of 74556478 is about 8634.6093136864. The cubic root of 74556478 is about 420.8833976143.

The spelling of 74556478 in words is "seventy-four million, five hundred fifty-six thousand, four hundred seventy-eight".