1240083920 has 20 divisors (see below), whose sum is σ = 2883195300. Its totient is φ = 496033536.

The previous prime is 1240083919. The next prime is 1240083931. The reversal of 1240083920 is 293800421.

It can be written as a sum of positive squares in 2 ways, for example, as 138109504 + 1101974416 = 11752^2 + 33196^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×1240083920³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7750445 + ... + 7750604.

It is an arithmetic number, because the mean of its divisors is an integer number (144159765).

Almost surely, 2^1240083920 is an apocalyptic number.

1240083920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240083920 is an abundant number, since it is smaller than the sum of its proper divisors (1643111380).

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

1240083920 is a wasteful number, since it uses less digits than its factorization.

1240083920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15501062 (or 15501056 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1240083920 is about 35214.8252870861. The cubic root of 1240083920 is about 1074.3613065624.

The spelling of 1240083920 in words is "one billion, two hundred forty million, eighty-three thousand, nine hundred twenty".