74220829 has 8 divisors (see below), whose sum is σ = 75929400. Its totient is φ = 72523776.

The previous prime is 74220823. The next prime is 74220833. The reversal of 74220829 is 92802247.

It can be written as a sum of positive squares in 4 ways, for example, as 24235929 + 49984900 = 4923^2 + 7070^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74220829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74220794 and 74220803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74220823) 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, 10897 + ... + 16345.

It is an arithmetic number, because the mean of its divisors is an integer number (9491175).

Almost surely, 2^74220829 is an apocalyptic number.

74220829 is the 5449-th heptagonal number.

It is an amenable number.

74220829 is a deficient number, since it is larger than the sum of its proper divisors (1708571).

74220829 is a wasteful number, since it uses less digits than its factorization.

74220829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5759.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 74220829 is about 8615.1511304213. The cubic root of 74220829 is about 420.2508497694.

The spelling of 74220829 in words is "seventy-four million, two hundred twenty thousand, eight hundred twenty-nine".