75243630 has 64 divisors (see below), whose sum is σ = 225151488. Its totient is φ = 15634560.

The previous prime is 75243617. The next prime is 75243631. The reversal of 75243630 is 3634257.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75243631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13977 + ... + 18596.

It is an arithmetic number, because the mean of its divisors is an integer number (3517992).

Almost surely, 2^75243630 is an apocalyptic number.

75243630 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

75243630 is an abundant number, since it is smaller than the sum of its proper divisors (149907858).

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

75243630 is a wasteful number, since it uses less digits than its factorization.

75243630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32601.

The product of its (nonzero) digits is 15120, while the sum is 30.

The square root of 75243630 is about 8674.3086179822. The cubic root of 75243630 is about 422.1724735425.

Adding to 75243630 its reverse (3634257), we get a palindrome (78877887).

The spelling of 75243630 in words is "seventy-five million, two hundred forty-three thousand, six hundred thirty".