74523240 has 384 divisors, whose sum is σ = 297198720. Its totient is φ = 16588800.

The previous prime is 74523221. The next prime is 74523269. The reversal of 74523240 is 4232547.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1817620 + ... + 1817660.

It is an arithmetic number, because the mean of its divisors is an integer number (773955).

Almost surely, 2^74523240 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 74523240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148599360).

74523240 is an abundant number, since it is smaller than the sum of its proper divisors (222675480).

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

74523240 is a wasteful number, since it uses less digits than its factorization.

74523240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 74523240 is about 8632.6844028958. The cubic root of 74523240 is about 420.8208436860.

Adding to 74523240 its reverse (4232547), we get a palindrome (78755787).

The spelling of 74523240 in words is "seventy-four million, five hundred twenty-three thousand, two hundred forty".