1020062640 has 40 divisors (see below), whose sum is σ = 3162194928. Its totient is φ = 272016640.

The previous prime is 1020062621. The next prime is 1020062647. The reversal of 1020062640 is 462600201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1020062647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2124891 + ... + 2125370.

Almost surely, 2^1020062640 is an apocalyptic number.

1020062640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020062640 is an abundant number, since it is smaller than the sum of its proper divisors (2142132288).

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

1020062640 is a wasteful number, since it uses less digits than its factorization.

1020062640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250277 (or 4250271 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1020062640 is about 31938.4194975268. The cubic root of 1020062640 is about 1006.6433152973.

Adding to 1020062640 its reverse (462600201), we get a palindrome (1482662841).

The spelling of 1020062640 in words is "one billion, twenty million, sixty-two thousand, six hundred forty".