74206620 has 72 divisors (see below), whose sum is σ = 226489536. Its totient is φ = 19665792.

The previous prime is 74206577. The next prime is 74206651. The reversal of 74206620 is 2660247.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29949 + ... + 32331.

It is an arithmetic number, because the mean of its divisors is an integer number (3145688).

Almost surely, 2^74206620 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 74206620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113244768).

74206620 is an abundant number, since it is smaller than the sum of its proper divisors (152282916).

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

74206620 is a wasteful number, since it uses less digits than its factorization.

74206620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571 (or 2566 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 74206620 is about 8614.3264391361. The cubic root of 74206620 is about 420.2240301398.

Adding to 74206620 its reverse (2660247), we get a palindrome (76866867).

The spelling of 74206620 in words is "seventy-four million, two hundred six thousand, six hundred twenty".