1154785380 has 192 divisors, whose sum is σ = 3883880448. Its totient is φ = 250652160.

The previous prime is 1154785319. The next prime is 1154785421. The reversal of 1154785380 is 835874511.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1670835 + ... + 1671525.

It is an arithmetic number, because the mean of its divisors is an integer number (20228544).

Almost surely, 2^1154785380 is an apocalyptic number.

1154785380 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 1154785380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1941940224).

1154785380 is an abundant number, since it is smaller than the sum of its proper divisors (2729095068).

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

1154785380 is a wasteful number, since it uses less digits than its factorization.

1154785380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906 (or 904 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 42.

The square root of 1154785380 is about 33982.1332467519. The cubic root of 1154785380 is about 1049.1407573684.

The spelling of 1154785380 in words is "one billion, one hundred fifty-four million, seven hundred eighty-five thousand, three hundred eighty".