1187423520 has 96 divisors (see below), whose sum is σ = 3753594432. Its totient is φ = 315528192.

The previous prime is 1187423491. The next prime is 1187423527. The reversal of 1187423520 is 253247811.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (1187423527) 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, 136419 + ... + 144861.

It is an arithmetic number, because the mean of its divisors is an integer number (39099942).

Almost surely, 2^1187423520 is an apocalyptic number.

1187423520 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 1187423520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1876797216).

1187423520 is an abundant number, since it is smaller than the sum of its proper divisors (2566170912).

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

1187423520 is a wasteful number, since it uses less digits than its factorization.

1187423520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8754 (or 8746 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 1187423520 is about 34459.0121738857. The cubic root of 1187423520 is about 1058.9331618362.

The spelling of 1187423520 in words is "one billion, one hundred eighty-seven million, four hundred twenty-three thousand, five hundred twenty".