76840380 has 48 divisors (see below), whose sum is σ = 239060640. Its totient is φ = 20490624.

The previous prime is 76840373. The next prime is 76840397. The reversal of 76840380 is 8304867.

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 15 ways as a sum of consecutive naturals, for example, 70609 + ... + 71688.

It is an arithmetic number, because the mean of its divisors is an integer number (4980430).

Almost surely, 2^76840380 is an apocalyptic number.

It is an amenable number.

76840380 is an abundant number, since it is smaller than the sum of its proper divisors (162220260).

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

76840380 is a wasteful number, since it uses less digits than its factorization.

76840380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142315 (or 142307 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 76840380 is about 8765.8644753384. The cubic root of 76840380 is about 425.1379114140.

It can be divided in two parts, 76 and 840380, that added together give a triangular number (840456 = T₁₂₉₆).

The spelling of 76840380 in words is "seventy-six million, eight hundred forty thousand, three hundred eighty".