7540428 has 24 divisors (see below), whose sum is σ = 20108032. Its totient is φ = 2154384.

The previous prime is 7540411. The next prime is 7540439. The reversal of 7540428 is 8240457.

It is a junction number, because it is equal to n+sod(n) for n = 7540395 and 7540404.

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, 44800 + ... + 44967.

Almost surely, 2^7540428 is an apocalyptic number.

It is an amenable number.

7540428 is an abundant number, since it is smaller than the sum of its proper divisors (12567604).

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

7540428 is a wasteful number, since it uses less digits than its factorization.

7540428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89781 (or 89779 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 7540428 is about 2745.9839766466. The cubic root of 7540428 is about 196.0944636974.

The spelling of 7540428 in words is "seven million, five hundred forty thousand, four hundred twenty-eight".