30400023 has 16 divisors (see below), whose sum is σ = 41702400. Its totient is φ = 19688736.

The previous prime is 30400003. The next prime is 30400031. The reversal of 30400023 is 32000403.

It is not a de Polignac number, because 30400023 - 2²² = 26205719 is a prime.

It is a super-2 number, since 2×30400023² = 1848322796801058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30399981 and 30400008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30400003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20286 + ... + 21732.

It is an arithmetic number, because the mean of its divisors is an integer number (2606400).

Almost surely, 2^30400023 is an apocalyptic number.

30400023 is a deficient number, since it is larger than the sum of its proper divisors (11302377).

30400023 is a wasteful number, since it uses less digits than its factorization.

30400023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646.

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 30400023 is about 5513.6215865799. The cubic root of 30400023 is about 312.0982288505.

Adding to 30400023 its reverse (32000403), we get a palindrome (62400426).

The spelling of 30400023 in words is "thirty million, four hundred thousand, twenty-three".