74555424 has 48 divisors (see below), whose sum is σ = 217455840. Its totient is φ = 24851520.

The previous prime is 74555423. The next prime is 74555431. The reversal of 74555424 is 42455547.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×74555424² = 11117022495639552, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (74555423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42282 + ... + 44009.

It is an arithmetic number, because the mean of its divisors is an integer number (4530330).

Almost surely, 2^74555424 is an apocalyptic number.

It is an amenable number.

74555424 is an abundant number, since it is smaller than the sum of its proper divisors (142900416).

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

74555424 is a wasteful number, since it uses less digits than its factorization.

74555424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86310 (or 86296 counting only the distinct ones).

The product of its digits is 112000, while the sum is 36.

The square root of 74555424 is about 8634.5482800202. The cubic root of 74555424 is about 420.8814142714.

It can be divided in two parts, 745 and 55424, that added together give a square (56169 = 237²).

The spelling of 74555424 in words is "seventy-four million, five hundred fifty-five thousand, four hundred twenty-four".