1142739780 has 288 divisors, whose sum is σ = 4150621440. Its totient is φ = 232565760.

The previous prime is 1142739769. The next prime is 1142739791. The reversal of 1142739780 is 879372411.

It is an interprime number because it is at equal distance from previous prime (1142739769) and next prime (1142739791).

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1107865 + ... + 1108895.

It is an arithmetic number, because the mean of its divisors is an integer number (14411880).

Almost surely, 2^1142739780 is an apocalyptic number.

1142739780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142739780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2075310720).

1142739780 is an abundant number, since it is smaller than the sum of its proper divisors (3007881660).

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

1142739780 is a wasteful number, since it uses less digits than its factorization.

1142739780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1090 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 1142739780 is about 33804.4343245084. The cubic root of 1142739780 is about 1045.4801270432.

The spelling of 1142739780 in words is "one billion, one hundred forty-two million, seven hundred thirty-nine thousand, seven hundred eighty".