380404261 has 4 divisors (see below), whose sum is σ = 382506124. Its totient is φ = 378302400.

The previous prime is 380404259. The next prime is 380404307. The reversal of 380404261 is 162404083.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23912100 + 356492161 = 4890^2 + 18881^2 .

It is a cyclic number.

It is not a de Polignac number, because 380404261 - 2¹ = 380404259 is a prime.

It is a super-2 number, since 2×380404261² = 289414803573912242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380404231) 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, 1050660 + ... + 1051021.

It is an arithmetic number, because the mean of its divisors is an integer number (95626531).

Almost surely, 2^380404261 is an apocalyptic number.

It is an amenable number.

380404261 is a deficient number, since it is larger than the sum of its proper divisors (2101863).

380404261 is a wasteful number, since it uses less digits than its factorization.

380404261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101862.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 380404261 is about 19503.9550091770. The cubic root of 380404261 is about 724.5724064427.

The spelling of 380404261 in words is "three hundred eighty million, four hundred four thousand, two hundred sixty-one".