74031620 has 24 divisors (see below), whose sum is σ = 167425944. Its totient is φ = 27334656.

The previous prime is 74031599. The next prime is 74031631. The reversal of 74031620 is 2613047.

It can be written as a sum of positive squares in 4 ways, for example, as 5837056 + 68194564 = 2416^2 + 8258^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142109 + ... + 142628.

It is an arithmetic number, because the mean of its divisors is an integer number (6976081).

Almost surely, 2^74031620 is an apocalyptic number.

It is an amenable number.

74031620 is an abundant number, since it is smaller than the sum of its proper divisors (93394324).

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

74031620 is a wasteful number, since it uses less digits than its factorization.

74031620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284759 (or 284757 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 74031620 is about 8604.1629459233. The cubic root of 74031620 is about 419.8934347930.

Adding to 74031620 its reverse (2613047), we get a palindrome (76644667).

The spelling of 74031620 in words is "seventy-four million, thirty-one thousand, six hundred twenty".