74134820 has 12 divisors (see below), whose sum is σ = 155683164. Its totient is φ = 29653920.

The previous prime is 74134813. The next prime is 74134829. The reversal of 74134820 is 2843147.

It can be written as a sum of positive squares in 2 ways, for example, as 14258176 + 59876644 = 3776^2 + 7738^2 .

It is not an unprimeable number, because it can be changed into a prime (74134829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853351 + ... + 1853390.

It is an arithmetic number, because the mean of its divisors is an integer number (12973597).

Almost surely, 2^74134820 is an apocalyptic number.

It is an amenable number.

74134820 is an abundant number, since it is smaller than the sum of its proper divisors (81548344).

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

74134820 is a wasteful number, since it uses less digits than its factorization.

74134820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3706750 (or 3706748 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 74134820 is about 8610.1579544164. The cubic root of 74134820 is about 420.0884545367.

Adding to 74134820 its reverse (2843147), we get a palindrome (76977967).

The spelling of 74134820 in words is "seventy-four million, one hundred thirty-four thousand, eight hundred twenty".