1147399680 has 240 divisors, whose sum is σ = 4268365200. Its totient is φ = 262176768.

The previous prime is 1147399667. The next prime is 1147399699. The reversal of 1147399680 is 869937411.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 374796 + ... + 377844.

It is an arithmetic number, because the mean of its divisors is an integer number (17784855).

Almost surely, 2^1147399680 is an apocalyptic number.

1147399680 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 1147399680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2134182600).

1147399680 is an abundant number, since it is smaller than the sum of its proper divisors (3120965520).

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

1147399680 is an equidigital number, since it uses as much as digits as its factorization.

1147399680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089 (or 3066 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 1147399680 is about 33873.2885914551. The cubic root of 1147399680 is about 1046.8992969248.

The spelling of 1147399680 in words is "one billion, one hundred forty-seven million, three hundred ninety-nine thousand, six hundred eighty".