30478861 has 8 divisors (see below), whose sum is σ = 35774720. Its totient is φ = 25418448.

The previous prime is 30478823. The next prime is 30478883. The reversal of 30478861 is 16887403.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 30478861 - 2¹³ = 30470669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30478861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30478891) 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, 58581 + ... + 59098.

It is an arithmetic number, because the mean of its divisors is an integer number (4471840).

Almost surely, 2^30478861 is an apocalyptic number.

It is an amenable number.

30478861 is a deficient number, since it is larger than the sum of its proper divisors (5295859).

30478861 is a wasteful number, since it uses less digits than its factorization.

30478861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117723.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 30478861 is about 5520.7663417319. The cubic root of 30478861 is about 312.3677896199.

The spelling of 30478861 in words is "thirty million, four hundred seventy-eight thousand, eight hundred sixty-one".