861381030 has 32 divisors (see below), whose sum is σ = 2086642944. Its totient is φ = 227554016.

The previous prime is 861381029. The next prime is 861381043. The reversal of 861381030 is 30183168.

It is a super-3 number, since 3×861381030³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130962 + ... + 137381.

It is an arithmetic number, because the mean of its divisors is an integer number (65207592).

Almost surely, 2^861381030 is an apocalyptic number.

861381030 is an abundant number, since it is smaller than the sum of its proper divisors (1225261914).

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

861381030 is a wasteful number, since it uses less digits than its factorization.

861381030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268460.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 861381030 is about 29349.2935179026. The cubic root of 861381030 is about 951.4773063118.

The spelling of 861381030 in words is "eight hundred sixty-one million, three hundred eighty-one thousand, thirty".