74428550 has 72 divisors (see below), whose sum is σ = 170607384. Its totient is φ = 24003840.

The previous prime is 74428547. The next prime is 74428561. The reversal of 74428550 is 5582447.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 74428550.

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 35 ways as a sum of consecutive naturals, for example, 40757 + ... + 42543.

It is an arithmetic number, because the mean of its divisors is an integer number (2369547).

Almost surely, 2^74428550 is an apocalyptic number.

74428550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

74428550 is an abundant number, since it is smaller than the sum of its proper divisors (96178834).

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

74428550 is a wasteful number, since it uses less digits than its factorization.

74428550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830 (or 1818 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 74428550 is about 8627.1982705859. The cubic root of 74428550 is about 420.6425350380.

The spelling of 74428550 in words is "seventy-four million, four hundred twenty-eight thousand, five hundred fifty".