30871764 has 216 divisors, whose sum is σ = 104071968. Its totient is φ = 7620480.

The previous prime is 30871759. The next prime is 30871769. The reversal of 30871764 is 46717803.

It is an interprime number because it is at equal distance from previous prime (30871759) and next prime (30871769).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30871769) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 717927 + ... + 717969.

Almost surely, 2^30871764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30871764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52035984).

30871764 is an abundant number, since it is smaller than the sum of its proper divisors (73200204).

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

30871764 is a wasteful number, since it uses less digits than its factorization.

30871764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 30871764 is about 5556.2364960466. The cubic root of 30871764 is about 313.7043073515.

It can be divided in two parts, 3087 and 1764, that added together give a triangular number (4851 = T₉₈).

The spelling of 30871764 in words is "thirty million, eight hundred seventy-one thousand, seven hundred sixty-four".