1161287460 has 72 divisors (see below), whose sum is σ = 3525500160. Its totient is φ = 309419328.

The previous prime is 1161287447. The next prime is 1161287461. The reversal of 1161287460 is 647821611.

It is a happy number.

1161287460 is a `hidden beast` number, since 116 + 1 + 2 + 87 + 460 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1161287461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 326371 + ... + 329909.

It is an arithmetic number, because the mean of its divisors is an integer number (48965280).

Almost surely, 2^1161287460 is an apocalyptic number.

1161287460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161287460 is an abundant number, since it is smaller than the sum of its proper divisors (2364212700).

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

1161287460 is a wasteful number, since it uses less digits than its factorization.

1161287460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5377 (or 5372 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1161287460 is about 34077.6680540204. The cubic root of 1161287460 is about 1051.1061540075.

The spelling of 1161287460 in words is "one billion, one hundred sixty-one million, two hundred eighty-seven thousand, four hundred sixty".