1005456140 has 48 divisors (see below), whose sum is σ = 2299479840. Its totient is φ = 367065600.

The previous prime is 1005456121. The next prime is 1005456149. The reversal of 1005456140 is 416545001.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (1005456149) 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, 1415 + ... + 44865.

It is an arithmetic number, because the mean of its divisors is an integer number (47905830).

Almost surely, 2^1005456140 is an apocalyptic number.

1005456140 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 1005456140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149739920).

1005456140 is an abundant number, since it is smaller than the sum of its proper divisors (1294023700).

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

1005456140 is a wasteful number, since it uses less digits than its factorization.

1005456140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43562 (or 43560 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1005456140 is about 31708.9283956428. The cubic root of 1005456140 is about 1001.8154156051.

The spelling of 1005456140 in words is "one billion, five million, four hundred fifty-six thousand, one hundred forty".