30697890 has 16 divisors (see below), whose sum is σ = 73675008. Its totient is φ = 8186096.

The previous prime is 30697873. The next prime is 30697897. The reversal of 30697890 is 9879603.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30697897) 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, 511602 + ... + 511661.

It is an arithmetic number, because the mean of its divisors is an integer number (4604688).

Almost surely, 2^30697890 is an apocalyptic number.

30697890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30697890 is an abundant number, since it is smaller than the sum of its proper divisors (42977118).

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

30697890 is a wasteful number, since it uses less digits than its factorization.

30697890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023273.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 30697890 is about 5540.5676604478. The cubic root of 30697890 is about 313.1142563475.

The spelling of 30697890 in words is "thirty million, six hundred ninety-seven thousand, eight hundred ninety".