1040865120 has 192 divisors, whose sum is σ = 3857595840. Its totient is φ = 261218304.

The previous prime is 1040865113. The next prime is 1040865139. The reversal of 1040865120 is 215680401.

1040865120 is a `hidden beast` number, since 1 + 0 + 4 + 0 + 8 + 651 + 2 + 0 = 666.

It is a super-2 number, since 2×1040865120² = 2166800396065228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 66354 + ... + 80526.

It is an arithmetic number, because the mean of its divisors is an integer number (20091645).

Almost surely, 2^1040865120 is an apocalyptic number.

1040865120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1040865120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928797920).

1040865120 is an abundant number, since it is smaller than the sum of its proper divisors (2816730720).

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

1040865120 is a wasteful number, since it uses less digits than its factorization.

1040865120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14214 (or 14200 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1040865120 is about 32262.4413211400. The cubic root of 1040865120 is about 1013.4402568768.

The spelling of 1040865120 in words is "one billion, forty million, eight hundred sixty-five thousand, one hundred twenty".