74781340 has 48 divisors (see below), whose sum is σ = 167368320. Its totient is φ = 27984960.

The previous prime is 74781323. The next prime is 74781341. The reversal of 74781340 is 4318747.

It is a junction number, because it is equal to n+sod(n) for n = 74781296 and 74781305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74781341) 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, 30355 + ... + 32725.

It is an arithmetic number, because the mean of its divisors is an integer number (3486840).

Almost surely, 2^74781340 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 74781340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83684160).

74781340 is an abundant number, since it is smaller than the sum of its proper divisors (92586980).

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

74781340 is a wasteful number, since it uses less digits than its factorization.

74781340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 74781340 is about 8647.6204819592. The cubic root of 74781340 is about 421.3061004159.

The spelling of 74781340 in words is "seventy-four million, seven hundred eighty-one thousand, three hundred forty".