1152856380 has 48 divisors (see below), whose sum is σ = 3476307744. Its totient is φ = 283779840.

The previous prime is 1152856379. The next prime is 1152856381. The reversal of 1152856380 is 836582511.

It is an interprime number because it is at equal distance from previous prime (1152856379) and next prime (1152856381).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152856381) 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, 738231 + ... + 739790.

It is an arithmetic number, because the mean of its divisors is an integer number (72423078).

Almost surely, 2^1152856380 is an apocalyptic number.

1152856380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1152856380 is an abundant number, since it is smaller than the sum of its proper divisors (2323451364).

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

1152856380 is a wasteful number, since it uses less digits than its factorization.

1152856380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478046 (or 1478044 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 1152856380 is about 33953.7388221091. The cubic root of 1152856380 is about 1048.5562561333.

The spelling of 1152856380 in words is "one billion, one hundred fifty-two million, eight hundred fifty-six thousand, three hundred eighty".