1147089990 has 64 divisors (see below), whose sum is σ = 2840914944. Its totient is φ = 296260608.

The previous prime is 1147089961. The next prime is 1147090001. The reversal of 1147089990 is 999807411.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132577 + ... + 140963.

It is an arithmetic number, because the mean of its divisors is an integer number (44389296).

Almost surely, 2^1147089990 is an apocalyptic number.

1147089990 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 1147089990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1420457472).

1147089990 is an abundant number, since it is smaller than the sum of its proper divisors (1693824954).

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

1147089990 is a wasteful number, since it uses less digits than its factorization.

1147089990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8541.

The product of its (nonzero) digits is 163296, while the sum is 48.

The square root of 1147089990 is about 33868.7169818994. The cubic root of 1147089990 is about 1046.8051003333.

The spelling of 1147089990 in words is "one billion, one hundred forty-seven million, eighty-nine thousand, nine hundred ninety".