74780 has 12 divisors (see below), whose sum is σ = 157080. Its totient is φ = 29904.

The previous prime is 74779. The next prime is 74797. The reversal of 74780 is 8747.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1850 + ... + 1889.

It is an arithmetic number, because the mean of its divisors is an integer number (13090).

2⁷⁴⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

74780 is an abundant number, since it is smaller than the sum of its proper divisors (82300).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78540).

74780 is a wasteful number, since it uses less digits than its factorization.

74780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748 (or 3746 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 74780 is about 273.4593205579. The cubic root of 74780 is about 42.1303583952.

The spelling of 74780 in words is "seventy-four thousand, seven hundred eighty".