74280672 has 96 divisors (see below), whose sum is σ = 218484000. Its totient is φ = 24551424.

The previous prime is 74280637. The next prime is 74280677. The reversal of 74280672 is 27608247.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74280677) 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, 128448 + ... + 129024.

It is an arithmetic number, because the mean of its divisors is an integer number (2275875).

Almost surely, 2^74280672 is an apocalyptic number.

74280672 is a gapful number since it is divisible by the number (72) 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 74280672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109242000).

74280672 is an abundant number, since it is smaller than the sum of its proper divisors (144203328).

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

74280672 is a wasteful number, since it uses less digits than its factorization.

74280672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 74280672 is about 8618.6235559978. The cubic root of 74280672 is about 420.3637664797.

The spelling of 74280672 in words is "seventy-four million, two hundred eighty thousand, six hundred seventy-two".