75399240 has 96 divisors (see below), whose sum is σ = 263148480. Its totient is φ = 17232768.

The previous prime is 75399211. The next prime is 75399257. The reversal of 75399240 is 4299357.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 532 + ... + 12291.

It is an arithmetic number, because the mean of its divisors is an integer number (2741130).

Almost surely, 2^75399240 is an apocalyptic number.

75399240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75399240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131574240).

75399240 is an abundant number, since it is smaller than the sum of its proper divisors (187749240).

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

75399240 is a wasteful number, since it uses less digits than its factorization.

75399240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12851 (or 12840 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 75399240 is about 8683.2735762499. The cubic root of 75399240 is about 422.4633022524.

The spelling of 75399240 in words is "seventy-five million, three hundred ninety-nine thousand, two hundred forty".