1140245640 has 64 divisors (see below), whose sum is σ = 3800822400. Its totient is φ = 304065216.

The previous prime is 1140245593. The next prime is 1140245647. The reversal of 1140245640 is 465420411.

1140245640 is a `hidden beast` number, since 1 + 14 + 0 + 2 + 4 + 5 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1140245647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526812 + ... + 528971.

It is an arithmetic number, because the mean of its divisors is an integer number (59387850).

Almost surely, 2^1140245640 is an apocalyptic number.

1140245640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1140245640 is an abundant number, since it is smaller than the sum of its proper divisors (2660576760).

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

1140245640 is a wasteful number, since it uses less digits than its factorization.

1140245640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055803 (or 1055793 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1140245640 is about 33767.5234507951. The cubic root of 1140245640 is about 1044.7189525258.

The spelling of 1140245640 in words is "one billion, one hundred forty million, two hundred forty-five thousand, six hundred forty".