74123456 has 56 divisors (see below), whose sum is σ = 161544000. Its totient is φ = 33465600.

The previous prime is 74123447. The next prime is 74123459. The reversal of 74123456 is 65432147.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (74123459) 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, 148295 + ... + 148793.

Almost surely, 2^74123456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74123456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80772000).

74123456 is an abundant number, since it is smaller than the sum of its proper divisors (87420544).

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

74123456 is a wasteful number, since it uses less digits than its factorization.

74123456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 723 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 74123456 is about 8609.4980109179. The cubic root of 74123456 is about 420.0669885591.

The spelling of 74123456 in words is "seventy-four million, one hundred twenty-three thousand, four hundred fifty-six".