74744670 has 256 divisors, whose sum is σ = 255467520. Its totient is φ = 13478400.

The previous prime is 74744653. The next prime is 74744671. The reversal of 74744670 is 7644747.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74744671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 570505 + ... + 570635.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^74744670 is an apocalyptic number.

74744670 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a pronic number, being equal to 8645×8646.

It is a practical number, because each smaller number is the sum of distinct divisors of 74744670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127733760).

74744670 is an abundant number, since it is smaller than the sum of its proper divisors (180722850).

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

74744670 is a wasteful number, since it uses less digits than its factorization.

74744670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191.

The product of its (nonzero) digits is 131712, while the sum is 39.

The square root of 74744670 is about 8645.4999855416. The cubic root of 74744670 is about 421.2372248530.

The spelling of 74744670 in words is "seventy-four million, seven hundred forty-four thousand, six hundred seventy".