75099420 has 192 divisors, whose sum is σ = 261273600. Its totient is φ = 17752320.

The previous prime is 75099383. The next prime is 75099433. The reversal of 75099420 is 2499057.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 279046 + ... + 279314.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^75099420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75099420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130636800).

75099420 is an abundant number, since it is smaller than the sum of its proper divisors (186174180).

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

75099420 is a wasteful number, since it uses less digits than its factorization.

75099420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 75099420 is about 8665.9921532390. The cubic root of 75099420 is about 421.9025927632.

The spelling of 75099420 in words is "seventy-five million, ninety-nine thousand, four hundred twenty".