67831380 has 36 divisors (see below), whose sum is σ = 205755732. Its totient is φ = 18088320.

The previous prime is 67831363. The next prime is 67831399. The reversal of 67831380 is 8313876.

It can be written as a sum of positive squares in 2 ways, for example, as 44036496 + 23794884 = 6636^2 + 4878^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×67831380² = 9202192225408800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188241 + ... + 188600.

It is an arithmetic number, because the mean of its divisors is an integer number (5715437).

Almost surely, 2^67831380 is an apocalyptic number.

67831380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67831380 is an abundant number, since it is smaller than the sum of its proper divisors (137924352).

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

67831380 is a wasteful number, since it uses less digits than its factorization.

67831380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376856 (or 376851 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 67831380 is about 8235.9808159077. The cubic root of 67831380 is about 407.8278541363.

The spelling of 67831380 in words is "sixty-seven million, eight hundred thirty-one thousand, three hundred eighty".