30989478 has 16 divisors (see below), whose sum is σ = 66746736. Its totient is φ = 9535200.

The previous prime is 30989473. The next prime is 30989489. The reversal of 30989478 is 87498903.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30989473) 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, 198573 + ... + 198728.

It is an arithmetic number, because the mean of its divisors is an integer number (4171671).

Almost surely, 2^30989478 is an apocalyptic number.

30989478 is an abundant number, since it is smaller than the sum of its proper divisors (35757258).

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

30989478 is a wasteful number, since it uses less digits than its factorization.

30989478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397319.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 30989478 is about 5566.8193791428. The cubic root of 30989478 is about 314.1025197041.

The spelling of 30989478 in words is "thirty million, nine hundred eighty-nine thousand, four hundred seventy-eight".