74723420 has 24 divisors (see below), whose sum is σ = 160259904. Its totient is φ = 29253056.

The previous prime is 74723413. The next prime is 74723437. The reversal of 74723420 is 2432747.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38807 + ... + 40686.

It is an arithmetic number, because the mean of its divisors is an integer number (6677496).

Almost surely, 2^74723420 is an apocalyptic number.

It is an amenable number.

74723420 is an abundant number, since it is smaller than the sum of its proper divisors (85536484).

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

74723420 is a wasteful number, since it uses less digits than its factorization.

74723420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79549 (or 79547 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 74723420 is about 8644.2709351339. The cubic root of 74723420 is about 421.1973016520.

The spelling of 74723420 in words is "seventy-four million, seven hundred twenty-three thousand, four hundred twenty".