74207730 has 64 divisors (see below), whose sum is σ = 189475200. Its totient is φ = 18547200.

The previous prime is 74207717. The next prime is 74207741. The reversal of 74207730 is 3770247.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 56926 + ... + 58214.

It is an arithmetic number, because the mean of its divisors is an integer number (2960550).

Almost surely, 2^74207730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74207730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94737600).

74207730 is an abundant number, since it is smaller than the sum of its proper divisors (115267470).

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

74207730 is a wasteful number, since it uses less digits than its factorization.

74207730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419.

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 74207730 is about 8614.3908664513. The cubic root of 74207730 is about 420.2261253992.

Adding to 74207730 its reverse (3770247), we get a palindrome (77977977).

The spelling of 74207730 in words is "seventy-four million, two hundred seven thousand, seven hundred thirty".