1085397432 has 128 divisors (see below), whose sum is σ = 3206400000. Its totient is φ = 306004608.

The previous prime is 1085397427. The next prime is 1085397437. The reversal of 1085397432 is 2347935801.

It is an interprime number because it is at equal distance from previous prime (1085397427) and next prime (1085397437).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085397437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 649494 + ... + 651162.

It is an arithmetic number, because the mean of its divisors is an integer number (25050000).

Almost surely, 2^1085397432 is an apocalyptic number.

1085397432 is a gapful number since it is divisible by the number (12) 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 1085397432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603200000).

1085397432 is an abundant number, since it is smaller than the sum of its proper divisors (2121002568).

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

1085397432 is a wasteful number, since it uses less digits than its factorization.

1085397432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778 (or 1760 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 1085397432 is about 32945.3704183152. The cubic root of 1085397432 is about 1027.6918913932.

The spelling of 1085397432 in words is "one billion, eighty-five million, three hundred ninety-seven thousand, four hundred thirty-two".