75280040 has 32 divisors (see below), whose sum is σ = 184779360. Its totient is φ = 27374400.

The previous prime is 75280031. The next prime is 75280111. The reversal of 75280040 is 4008257.

It is a junction number, because it is equal to n+sod(n) for n = 75279991 and 75280009.

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, 85106 + ... + 85985.

It is an arithmetic number, because the mean of its divisors is an integer number (5774355).

Almost surely, 2^75280040 is an apocalyptic number.

It is an amenable number.

75280040 is an abundant number, since it is smaller than the sum of its proper divisors (109499320).

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

75280040 is a wasteful number, since it uses less digits than its factorization.

75280040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171113 (or 171109 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 75280040 is about 8676.4070904955. The cubic root of 75280040 is about 422.2405582475.

Adding to 75280040 its reverse (4008257), we get a palindrome (79288297).

The spelling of 75280040 in words is "seventy-five million, two hundred eighty thousand, forty".