74207420 has 96 divisors (see below), whose sum is σ = 185286528. Its totient is φ = 24440832.

The previous prime is 74207387. The next prime is 74207423. The reversal of 74207420 is 2470247.

It is a self number, because there is not a number n which added to its sum of digits gives 74207420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74207423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 541592 + ... + 541728.

It is an arithmetic number, because the mean of its divisors is an integer number (1930068).

Almost surely, 2^74207420 is an apocalyptic number.

74207420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74207420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92643264).

74207420 is an abundant number, since it is smaller than the sum of its proper divisors (111079108).

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

74207420 is a wasteful number, since it uses less digits than its factorization.

74207420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 74207420 is about 8614.3728732857. The cubic root of 74207420 is about 420.2255402387.

Adding to 74207420 its reverse (2470247), we get a palindrome (76677667).

The spelling of 74207420 in words is "seventy-four million, two hundred seven thousand, four hundred twenty".