74773440 has 168 divisors, whose sum is σ = 294010080. Its totient is φ = 17086464.

The previous prime is 74773427. The next prime is 74773459. The reversal of 74773440 is 4437747.

It is a tau number, because it is divible by the number of its divisors (168).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 74773395 and 74773404.

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 23 ways as a sum of consecutive naturals, for example, 18306 + ... + 22014.

It is an arithmetic number, because the mean of its divisors is an integer number (1750060).

Almost surely, 2^74773440 is an apocalyptic number.

74773440 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 74773440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147005040).

74773440 is an abundant number, since it is smaller than the sum of its proper divisors (219236640).

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

74773440 is a wasteful number, since it uses less digits than its factorization.

74773440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3739 (or 3726 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 36.

The square root of 74773440 is about 8647.1636968430. The cubic root of 74773440 is about 421.2912641149.

The spelling of 74773440 in words is "seventy-four million, seven hundred seventy-three thousand, four hundred forty".