1002578540 has 24 divisors (see below), whose sum is σ = 2154379920. Its totient is φ = 391704768.

The previous prime is 1002578537. The next prime is 1002578561. The reversal of 1002578540 is 458752001.

It is a junction number, because it is equal to n+sod(n) for n = 1002578497 and 1002578506.

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, 582035 + ... + 583754.

It is an arithmetic number, because the mean of its divisors is an integer number (89765830).

Almost surely, 2^1002578540 is an apocalyptic number.

1002578540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002578540 is an abundant number, since it is smaller than the sum of its proper divisors (1151801380).

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

1002578540 is a wasteful number, since it uses less digits than its factorization.

1002578540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165841 (or 1165839 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 1002578540 is about 31663.5206507426. The cubic root of 1002578540 is about 1000.8587756266.

The spelling of 1002578540 in words is "one billion, two million, five hundred seventy-eight thousand, five hundred forty".