1161330690 has 128 divisors (see below), whose sum is σ = 3209310720. Its totient is φ = 266416128.

The previous prime is 1161330671. The next prime is 1161330691. The reversal of 1161330690 is 960331611.

It is a super-2 number, since 2×1161330690² = 2697377943071752200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1161330691) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 721867 + ... + 723473.

It is an arithmetic number, because the mean of its divisors is an integer number (25072740).

Almost surely, 2^1161330690 is an apocalyptic number.

1161330690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161330690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1604655360).

1161330690 is an abundant number, since it is smaller than the sum of its proper divisors (2047980030).

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

1161330690 is a wasteful number, since it uses less digits than its factorization.

1161330690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 1161330690 is about 34078.3023344767. The cubic root of 1161330690 is about 1051.1191966454.

The spelling of 1161330690 in words is "one billion, one hundred sixty-one million, three hundred thirty thousand, six hundred ninety".