74812780 has 48 divisors (see below), whose sum is σ = 181177920. Its totient is φ = 25417728.

The previous prime is 74812769. The next prime is 74812789. The reversal of 74812780 is 8721847.

It is not an unprimeable number, because it can be changed into a prime (74812789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13456 + ... + 18184.

It is an arithmetic number, because the mean of its divisors is an integer number (3774540).

Almost surely, 2^74812780 is an apocalyptic number.

74812780 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74812780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90588960).

74812780 is an abundant number, since it is smaller than the sum of its proper divisors (106365140).

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

74812780 is a wasteful number, since it uses less digits than its factorization.

74812780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4858 (or 4856 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 74812780 is about 8649.4381320407. The cubic root of 74812780 is about 421.3651347861.

The spelling of 74812780 in words is "seventy-four million, eight hundred twelve thousand, seven hundred eighty".