1020140240 has 40 divisors (see below), whose sum is σ = 2710659840. Its totient is φ = 349762176.

The previous prime is 1020140203. The next prime is 1020140257. The reversal of 1020140240 is 420410201.

1020140240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×1020140240² = 2081372218534515200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

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, 910280 + ... + 911399.

It is an arithmetic number, because the mean of its divisors is an integer number (67766496).

Almost surely, 2^1020140240 is an apocalyptic number.

1020140240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020140240 is an abundant number, since it is smaller than the sum of its proper divisors (1690519600).

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

1020140240 is a wasteful number, since it uses less digits than its factorization.

1020140240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821699 (or 1821693 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1020140240 is about 31939.6343122460. The cubic root of 1020140240 is about 1006.6688410305.

Adding to 1020140240 its reverse (420410201), we get a palindrome (1440550441).

The spelling of 1020140240 in words is "one billion, twenty million, one hundred forty thousand, two hundred forty".