90730 has 16 divisors (see below), whose sum is σ = 167904. Its totient is φ = 35280.

The previous prime is 90709. The next prime is 90731. The reversal of 90730 is 3709.

90730 = T₁₈₈ + T₁₈₉ + ... + T₁₉₂.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 90698 and 90707.

It is not an unprimeable number, because it can be changed into a prime (90731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325 + ... + 535.

It is an arithmetic number, because the mean of its divisors is an integer number (10494).

2⁹⁰⁷³⁰ is an apocalyptic number.

90730 is a deficient number, since it is larger than the sum of its proper divisors (77174).

90730 is a wasteful number, since it uses less digits than its factorization.

90730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 189, while the sum is 19.

The square root of 90730 is about 301.2142094922. The cubic root of 90730 is about 44.9348852486.

It can be divided in two parts, 90 and 730, that added together give a triangular number (820 = T₄₀).

The spelling of 90730 in words is "ninety thousand, seven hundred thirty".