74137420 has 48 divisors (see below), whose sum is σ = 179016768. Its totient is φ = 25263360.

The previous prime is 74137417. The next prime is 74137421. The reversal of 74137420 is 2473147.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (74137421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22690 + ... + 25750.

It is an arithmetic number, because the mean of its divisors is an integer number (3729516).

Almost surely, 2^74137420 is an apocalyptic number.

74137420 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 74137420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89508384).

74137420 is an abundant number, since it is smaller than the sum of its proper divisors (104879348).

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

74137420 is a wasteful number, since it uses less digits than its factorization.

74137420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3250 (or 3248 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 74137420 is about 8610.3089375469. The cubic root of 74137420 is about 420.0933654868.

The spelling of 74137420 in words is "seventy-four million, one hundred thirty-seven thousand, four hundred twenty".