74277840 has 320 divisors, whose sum is σ = 299980800. Its totient is φ = 14764032.

The previous prime is 74277817. The next prime is 74277869. The reversal of 74277840 is 4877247.

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

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 414871 + ... + 415049.

It is an arithmetic number, because the mean of its divisors is an integer number (937440).

Almost surely, 2^74277840 is an apocalyptic number.

74277840 is a gapful number since it is divisible by the number (70) 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 74277840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149990400).

74277840 is an abundant number, since it is smaller than the sum of its proper divisors (225702960).

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

74277840 is a wasteful number, since it uses less digits than its factorization.

74277840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 39.

The square root of 74277840 is about 8618.4592590555. The cubic root of 74277840 is about 420.3584241958.

The spelling of 74277840 in words is "seventy-four million, two hundred seventy-seven thousand, eight hundred forty".