1145059890 has 128 divisors (see below), whose sum is σ = 3192134400. Its totient is φ = 260444160.

The previous prime is 1145059879. The next prime is 1145059963. The reversal of 1145059890 is 989505411.

It is a super-2 number, since 2×1145059890² = 2622324303373624200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 301926 + ... + 305694.

It is an arithmetic number, because the mean of its divisors is an integer number (24938550).

Almost surely, 2^1145059890 is an apocalyptic number.

1145059890 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 1145059890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1596067200).

1145059890 is an abundant number, since it is smaller than the sum of its proper divisors (2047074510).

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

1145059890 is a wasteful number, since it uses less digits than its factorization.

1145059890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852.

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 1145059890 is about 33838.7335755935. The cubic root of 1145059890 is about 1046.1871964917.

The spelling of 1145059890 in words is "one billion, one hundred forty-five million, fifty-nine thousand, eight hundred ninety".