4507021540 has 48 divisors (see below), whose sum is σ = 11386166400. Its totient is φ = 1463933952.

The previous prime is 4507021537. The next prime is 4507021591. The reversal of 4507021540 is 451207054.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 4507021499 and 4507021508.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 844525 + ... + 849844.

It is an arithmetic number, because the mean of its divisors is an integer number (237211800).

Almost surely, 2^4507021540 is an apocalyptic number.

It is an amenable number.

4507021540 is an abundant number, since it is smaller than the sum of its proper divisors (6879144860).

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

4507021540 is a wasteful number, since it uses less digits than its factorization.

4507021540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694404 (or 1694402 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 4507021540 is about 67134.3543947508. The cubic root of 4507021540 is about 1651.8218676345.

Adding to 4507021540 its reverse (451207054), we get a palindrome (4958228594).

The spelling of 4507021540 in words is "four billion, five hundred seven million, twenty-one thousand, five hundred forty".