1085779728 has 100 divisors (see below), whose sum is σ = 3428293968. Its totient is φ = 329019840.

The previous prime is 1085779727. The next prime is 1085779729. The reversal of 1085779728 is 8279775801.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1085779727) and next prime (1085779729).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1085779727) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23826 + ... + 52337.

Almost surely, 2^1085779728 is an apocalyptic number.

1085779728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1085779728 is an abundant number, since it is smaller than the sum of its proper divisors (2342514240).

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

1085779728 is a wasteful number, since it uses less digits than its factorization.

1085779728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76194 (or 76179 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 54.

The square root of 1085779728 is about 32951.1718759743. The cubic root of 1085779728 is about 1027.8125342625.

The spelling of 1085779728 in words is "one billion, eighty-five million, seven hundred seventy-nine thousand, seven hundred twenty-eight".