380818840 has 16 divisors (see below), whose sum is σ = 856842480. Its totient is φ = 152327520.

The previous prime is 380818831. The next prime is 380818847. The reversal of 380818840 is 48818083.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 9520471 = 380818840 / (3 + 8 + 0 + 8 + 1 + 8 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 380818793 and 380818802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380818847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4760196 + ... + 4760275.

It is an arithmetic number, because the mean of its divisors is an integer number (53552655).

Almost surely, 2^380818840 is an apocalyptic number.

It is an amenable number.

380818840 is an abundant number, since it is smaller than the sum of its proper divisors (476023640).

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

380818840 is a wasteful number, since it uses less digits than its factorization.

380818840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9520482 (or 9520478 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 380818840 is about 19514.5801902065. The cubic root of 380818840 is about 724.8355330461.

The spelling of 380818840 in words is "three hundred eighty million, eight hundred eighteen thousand, eight hundred forty".