30420894 has 32 divisors (see below), whose sum is σ = 69719040. Its totient is φ = 8668512.

The previous prime is 30420877. The next prime is 30420899. The reversal of 30420894 is 49802403.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20667 + ... + 22089.

It is an arithmetic number, because the mean of its divisors is an integer number (2178720).

Almost surely, 2^30420894 is an apocalyptic number.

30420894 is an abundant number, since it is smaller than the sum of its proper divisors (39298146).

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

30420894 is a wasteful number, since it uses less digits than its factorization.

30420894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 30420894 is about 5515.5139379753. The cubic root of 30420894 is about 312.1696357266.

The spelling of 30420894 in words is "thirty million, four hundred twenty thousand, eight hundred ninety-four".