1240681608 has 48 divisors (see below), whose sum is σ = 3537034800. Its totient is φ = 391793760.

The previous prime is 1240681601. The next prime is 1240681609. The reversal of 1240681608 is 8061860421.

1240681608 is a `hidden beast` number, since 1 + 2 + 40 + 6 + 8 + 1 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1240681601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 452098 + ... + 454833.

It is an arithmetic number, because the mean of its divisors is an integer number (73688225).

Almost surely, 2^1240681608 is an apocalyptic number.

1240681608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1240681608 is an abundant number, since it is smaller than the sum of its proper divisors (2296353192).

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

1240681608 is a wasteful number, since it uses less digits than its factorization.

1240681608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906962 (or 906955 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1240681608 is about 35223.3105769461. The cubic root of 1240681608 is about 1074.5338835184.

The spelling of 1240681608 in words is "one billion, two hundred forty million, six hundred eighty-one thousand, six hundred eight".