75390630 has 32 divisors (see below), whose sum is σ = 206786304. Its totient is φ = 17232096.

The previous prime is 75390617. The next prime is 75390641. The reversal of 75390630 is 3609357.

It is a junction number, because it is equal to n+sod(n) for n = 75390591 and 75390600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179292 + ... + 179711.

It is an arithmetic number, because the mean of its divisors is an integer number (6462072).

Almost surely, 2^75390630 is an apocalyptic number.

75390630 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

75390630 is an abundant number, since it is smaller than the sum of its proper divisors (131395674).

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

75390630 is a wasteful number, since it uses less digits than its factorization.

75390630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359020.

The product of its (nonzero) digits is 17010, while the sum is 33.

The square root of 75390630 is about 8682.7777813324. Note that the first 4 decimals coincide. The cubic root of 75390630 is about 422.4472209785.

Adding to 75390630 its reverse (3609357), we get a palindrome (78999987).

The spelling of 75390630 in words is "seventy-five million, three hundred ninety thousand, six hundred thirty".