30661995 has 48 divisors (see below), whose sum is σ = 61477920. Its totient is φ = 12934656.

The previous prime is 30661993. The next prime is 30662003. The reversal of 30661995 is 59916603.

30661995 = T₁₃₀ + T₁₃₁ + ... + T₅₇₀.

It is not a de Polignac number, because 30661995 - 2¹ = 30661993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30661993) 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 47 ways as a sum of consecutive naturals, for example, 7951 + ... + 11159.

It is an arithmetic number, because the mean of its divisors is an integer number (1280790).

Almost surely, 2^30661995 is an apocalyptic number.

30661995 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

30661995 is an abundant number, since it is smaller than the sum of its proper divisors (30815925).

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

30661995 is a wasteful number, since it uses less digits than its factorization.

30661995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244 (or 3237 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 30661995 is about 5537.3274239474. The cubic root of 30661995 is about 312.9921673944.

The spelling of 30661995 in words is "thirty million, six hundred sixty-one thousand, nine hundred ninety-five".