74478780 has 144 divisors (see below), whose sum is σ = 237523104. Its totient is φ = 18869760.

The previous prime is 74478779. The next prime is 74478791. The reversal of 74478780 is 8787447.

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

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 352875 + ... + 353085.

It is an arithmetic number, because the mean of its divisors is an integer number (1649466).

Almost surely, 2^74478780 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 74478780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118761552).

74478780 is an abundant number, since it is smaller than the sum of its proper divisors (163044324).

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

74478780 is a wasteful number, since it uses less digits than its factorization.

74478780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 74478780 is about 8630.1089216765. The cubic root of 74478780 is about 420.7371408633.

It can be divided in two parts, 744 and 78780, that added together give a square (79524 = 282²).

The spelling of 74478780 in words is "seventy-four million, four hundred seventy-eight thousand, seven hundred eighty".