73002540438 has 64 divisors (see below), whose sum is σ = 165938754240. Its totient is φ = 23782636800.

The previous prime is 73002540437. The next prime is 73002540439. The reversal of 73002540438 is 83404520037.

It is a happy number.

73002540438 is a `hidden beast` number, since 73 + 0 + 0 + 2 + 540 + 43 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (73002540437) and next prime (73002540439).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73002540433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446578 + ... + 587738.

It is an arithmetic number, because the mean of its divisors is an integer number (2592793035).

Almost surely, 2^73002540438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73002540438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82969377120).

73002540438 is an abundant number, since it is smaller than the sum of its proper divisors (92936213802).

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

73002540438 is a wasteful number, since it uses less digits than its factorization.

73002540438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141390 (or 141384 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 73002540438 in words is "seventy-three billion, two million, five hundred forty thousand, four hundred thirty-eight".