7540020 has 48 divisors (see below), whose sum is σ = 23459520. Its totient is φ = 2010528.

The previous prime is 7540019. The next prime is 7540051. The reversal of 7540020 is 200457.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 7539975 and 7540002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6442 + ... + 7521.

It is an arithmetic number, because the mean of its divisors is an integer number (488740).

Almost surely, 2^7540020 is an apocalyptic number.

It is an amenable number.

7540020 is an abundant number, since it is smaller than the sum of its proper divisors (15919500).

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

7540020 is a wasteful number, since it uses less digits than its factorization.

7540020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13981 (or 13973 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 7540020 is about 2745.9096853320. The cubic root of 7540020 is about 196.0909268521.

Adding to 7540020 its reverse (200457), we get a palindrome (7740477).

The spelling of 7540020 in words is "seven million, five hundred forty thousand, twenty".