1173685728 has 48 divisors (see below), whose sum is σ = 3083466960. Its totient is φ = 390905856.

The previous prime is 1173685693. The next prime is 1173685759. The reversal of 1173685728 is 8275863711.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1173685728² = 2755076376221779968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130926 + ... + 139602.

It is an arithmetic number, because the mean of its divisors is an integer number (64238895).

Almost surely, 2^1173685728 is an apocalyptic number.

It is an amenable number.

1173685728 is an abundant number, since it is smaller than the sum of its proper divisors (1909781232).

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

1173685728 is a wasteful number, since it uses less digits than its factorization.

1173685728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10099 (or 10091 counting only the distinct ones).

The product of its digits is 564480, while the sum is 48.

The square root of 1173685728 is about 34259.0970108671. The cubic root of 1173685728 is about 1054.8335662821.

The spelling of 1173685728 in words is "one billion, one hundred seventy-three million, six hundred eighty-five thousand, seven hundred twenty-eight".