75402140 has 48 divisors (see below), whose sum is σ = 182909664. Its totient is φ = 25804800.

The previous prime is 75402133. The next prime is 75402149. The reversal of 75402140 is 4120457.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75402149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6341 + ... + 13820.

It is an arithmetic number, because the mean of its divisors is an integer number (3810618).

Almost surely, 2^75402140 is an apocalyptic number.

It is an amenable number.

75402140 is an abundant number, since it is smaller than the sum of its proper divisors (107507524).

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

75402140 is a wasteful number, since it uses less digits than its factorization.

75402140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20198 (or 20196 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 75402140 is about 8683.4405623578. The cubic root of 75402140 is about 422.4687184337.

Adding to 75402140 its reverse (4120457), we get a palindrome (79522597).

The spelling of 75402140 in words is "seventy-five million, four hundred two thousand, one hundred forty".