1020067640 has 32 divisors (see below), whose sum is σ = 2296168560. Its totient is φ = 407846400.

The previous prime is 1020067639. The next prime is 1020067669. The reversal of 1020067640 is 467600201.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120755 + ... + 128925.

Almost surely, 2^1020067640 is an apocalyptic number.

1020067640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020067640 is an abundant number, since it is smaller than the sum of its proper divisors (1276100920).

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

1020067640 is a wasteful number, since it uses less digits than its factorization.

1020067640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11303 (or 11299 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1020067640 is about 31938.4977730638. The cubic root of 1020067640 is about 1006.6449600356.

Adding to 1020067640 its reverse (467600201), we get a palindrome (1487667841).

The spelling of 1020067640 in words is "one billion, twenty million, sixty-seven thousand, six hundred forty".