74000720 has 80 divisors (see below), whose sum is σ = 181274112. Its totient is φ = 28055040.

The previous prime is 74000713. The next prime is 74000723. The reversal of 74000720 is 2700047.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×74000720² = 10952213121036800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 74000692 and 74000701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74000723) 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, 131159 + ... + 131721.

Almost surely, 2^74000720 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 74000720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90637056).

74000720 is an abundant number, since it is smaller than the sum of its proper divisors (107273392).

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

74000720 is a wasteful number, since it uses less digits than its factorization.

74000720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 74000720 is about 8602.3671160908. The cubic root of 74000720 is about 419.8350069991.

Adding to 74000720 its reverse (2700047), we get a palindrome (76700767).

The spelling of 74000720 in words is "seventy-four million, seven hundred twenty", and thus it is an aban number.