7475731240 has 16 divisors (see below), whose sum is σ = 16820395380. Its totient is φ = 2990292480.

The previous prime is 7475731183. The next prime is 7475731243. The reversal of 7475731240 is 421375747.

It can be written as a sum of positive squares in 2 ways, for example, as 7472219364 + 3511876 = 86442^2 + 1874^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 186893281 = 7475731240 / (7 + 4 + 7 + 5 + 7 + 3 + 1 + 2 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 7475731193 and 7475731202.

It is not an unprimeable number, because it can be changed into a prime (7475731243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93446601 + ... + 93446680.

Almost surely, 2^7475731240 is an apocalyptic number.

It is an amenable number.

7475731240 is an abundant number, since it is smaller than the sum of its proper divisors (9344664140).

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

7475731240 is a wasteful number, since it uses less digits than its factorization.

7475731240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186893292 (or 186893288 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 40.

The square root of 7475731240 is about 86462.3110956444. The cubic root of 7475731240 is about 1955.3202284595.

The spelling of 7475731240 in words is "seven billion, four hundred seventy-five million, seven hundred thirty-one thousand, two hundred forty".