1161612840 has 64 divisors (see below), whose sum is σ = 3528979200. Its totient is φ = 305839872.

The previous prime is 1161612833. The next prime is 1161612847. The reversal of 1161612840 is 482161611.

It is an interprime number because it is at equal distance from previous prime (1161612833) and next prime (1161612847).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1161612798 and 1161612807.

It is not an unprimeable number, because it can be changed into a prime (1161612847) 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, 51787 + ... + 70746.

It is an arithmetic number, because the mean of its divisors is an integer number (55140300).

Almost surely, 2^1161612840 is an apocalyptic number.

1161612840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161612840 is an abundant number, since it is smaller than the sum of its proper divisors (2367366360).

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

1161612840 is a wasteful number, since it uses less digits than its factorization.

1161612840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122626 (or 122622 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1161612840 is about 34082.4418139311. The cubic root of 1161612840 is about 1051.2043143094.

The spelling of 1161612840 in words is "one billion, one hundred sixty-one million, six hundred twelve thousand, eight hundred forty".