30940491 has 16 divisors (see below), whose sum is σ = 42102144. Its totient is φ = 20207424.

The previous prime is 30940463. The next prime is 30940537. The reversal of 30940491 is 19404903.

It is not a de Polignac number, because 30940491 - 2¹⁴ = 30924107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30940411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33660 + ... + 34566.

It is an arithmetic number, because the mean of its divisors is an integer number (2631384).

Almost surely, 2^30940491 is an apocalyptic number.

30940491 is a deficient number, since it is larger than the sum of its proper divisors (11161653).

30940491 is a wasteful number, since it uses less digits than its factorization.

30940491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 30940491 is about 5562.4177297287. The cubic root of 30940491 is about 313.9369252728.

The spelling of 30940491 in words is "thirty million, nine hundred forty thousand, four hundred ninety-one".