30748730 has 8 divisors (see below), whose sum is σ = 55347732. Its totient is φ = 12299488.

The previous prime is 30748717. The next prime is 30748759. The reversal of 30748730 is 3784703.

It can be written as a sum of positive squares in 2 ways, for example, as 30481441 + 267289 = 5521^2 + 517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×30748730³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1537427 + ... + 1537446.

Almost surely, 2^30748730 is an apocalyptic number.

30748730 is a deficient number, since it is larger than the sum of its proper divisors (24599002).

30748730 is a wasteful number, since it uses less digits than its factorization.

30748730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074880.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 30748730 is about 5545.1537399787. The cubic root of 30748730 is about 313.2870146814.

The spelling of 30748730 in words is "thirty million, seven hundred forty-eight thousand, seven hundred thirty".