7538728403 has 4 divisors (see below), whose sum is σ = 7540830168. Its totient is φ = 7536626640.

The previous prime is 7538728381. The next prime is 7538728433. The reversal of 7538728403 is 3048278357.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7538728403 - 2²⁴ = 7521951187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7538728433) 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, 1045493 + ... + 1052678.

It is an arithmetic number, because the mean of its divisors is an integer number (1885207542).

Almost surely, 2^7538728403 is an apocalyptic number.

7538728403 is a deficient number, since it is larger than the sum of its proper divisors (2101765).

7538728403 is a wasteful number, since it uses less digits than its factorization.

7538728403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101764.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The square root of 7538728403 is about 86825.8510064831. The cubic root of 7538728403 is about 1960.7972949378.

The spelling of 7538728403 in words is "seven billion, five hundred thirty-eight million, seven hundred twenty-eight thousand, four hundred three".