7540220 has 12 divisors (see below), whose sum is σ = 15834504. Its totient is φ = 3016080.

The previous prime is 7540219. The next prime is 7540237. The reversal of 7540220 is 220457.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 377011 = 7540220 / (7 + 5 + 4 + 0 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 7540192 and 7540201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188486 + ... + 188525.

It is an arithmetic number, because the mean of its divisors is an integer number (1319542).

Almost surely, 2^7540220 is an apocalyptic number.

It is an amenable number.

7540220 is an abundant number, since it is smaller than the sum of its proper divisors (8294284).

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

7540220 is a wasteful number, since it uses less digits than its factorization.

7540220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377020 (or 377018 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 7540220 is about 2745.9461028942. The cubic root of 7540220 is about 196.0926606157.

Adding to 7540220 its reverse (220457), we get a palindrome (7760677).

The spelling of 7540220 in words is "seven million, five hundred forty thousand, two hundred twenty".