74743830 has 128 divisors (see below), whose sum is σ = 231413760. Its totient is φ = 16813440.

The previous prime is 74743829. The next prime is 74743831. The reversal of 74743830 is 3834747.

It is an interprime number because it is at equal distance from previous prime (74743829) and next prime (74743831).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74743831) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 133912 + ... + 134468.

It is an arithmetic number, because the mean of its divisors is an integer number (1807920).

Almost surely, 2^74743830 is an apocalyptic number.

74743830 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 74743830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115706880).

74743830 is an abundant number, since it is smaller than the sum of its proper divisors (156669930).

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

74743830 is a wasteful number, since it uses less digits than its factorization.

74743830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 74743830 is about 8645.4514052188. The cubic root of 74743830 is about 421.2356468560.

The spelling of 74743830 in words is "seventy-four million, seven hundred forty-three thousand, eight hundred thirty".