74520438 has 16 divisors (see below), whose sum is σ = 151853616. Its totient is φ = 24371360.

The previous prime is 74520431. The next prime is 74520443. The reversal of 74520438 is 83402547.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 74520399 and 74520408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74520431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116853 + ... + 117488.

It is an arithmetic number, because the mean of its divisors is an integer number (9490851).

Almost surely, 2^74520438 is an apocalyptic number.

74520438 is an abundant number, since it is smaller than the sum of its proper divisors (77333178).

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

74520438 is a wasteful number, since it uses less digits than its factorization.

74520438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234399.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 74520438 is about 8632.5221111793. The cubic root of 74520438 is about 420.8155694710.

The spelling of 74520438 in words is "seventy-four million, five hundred twenty thousand, four hundred thirty-eight".