1142346728 has 32 divisors (see below), whose sum is σ = 2259300000. Its totient is φ = 539991360.

The previous prime is 1142346691. The next prime is 1142346749. The reversal of 1142346728 is 8276432411.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 1142346691 and 1142346700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68318 + ... + 83378.

It is an arithmetic number, because the mean of its divisors is an integer number (70603125).

Almost surely, 2^1142346728 is an apocalyptic number.

It is an amenable number.

1142346728 is a deficient number, since it is larger than the sum of its proper divisors (1116953272).

1142346728 is a wasteful number, since it uses less digits than its factorization.

1142346728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15585 (or 15581 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 1142346728 is about 33798.6202085233. The cubic root of 1142346728 is about 1045.3602469722.

The spelling of 1142346728 in words is "one billion, one hundred forty-two million, three hundred forty-six thousand, seven hundred twenty-eight".