1140039978 has 144 divisors (see below), whose sum is σ = 2962048320. Its totient is φ = 291392640.

The previous prime is 1140039977. The next prime is 1140039983. The reversal of 1140039978 is 8799300411.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1140039977) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2596683 + ... + 2597121.

It is an arithmetic number, because the mean of its divisors is an integer number (20569780).

Almost surely, 2^1140039978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1140039978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1481024160).

1140039978 is an abundant number, since it is smaller than the sum of its proper divisors (1822008342).

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

1140039978 is a wasteful number, since it uses less digits than its factorization.

1140039978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1140039978 is about 33764.4780501639. The cubic root of 1140039978 is about 1044.6561380173.

The spelling of 1140039978 in words is "one billion, one hundred forty million, thirty-nine thousand, nine hundred seventy-eight".