75345420 has 24 divisors (see below), whose sum is σ = 210967344. Its totient is φ = 20092096.

The previous prime is 75345409. The next prime is 75345433. The reversal of 75345420 is 2454357.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 627819 + ... + 627938.

It is an arithmetic number, because the mean of its divisors is an integer number (8790306).

Almost surely, 2^75345420 is an apocalyptic number.

It is an amenable number.

75345420 is an abundant number, since it is smaller than the sum of its proper divisors (135621924).

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

75345420 is a wasteful number, since it uses less digits than its factorization.

75345420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255769 (or 1255767 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 75345420 is about 8680.1739613904. The cubic root of 75345420 is about 422.3627601826.

Adding to 75345420 its reverse (2454357), we get a palindrome (77799777).

The spelling of 75345420 in words is "seventy-five million, three hundred forty-five thousand, four hundred twenty".