381777406 has 8 divisors (see below), whose sum is σ = 582054264. Its totient is φ = 187759320.

The previous prime is 381777401. The next prime is 381777419. The reversal of 381777406 is 604777183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381777401) 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, 1564540 + ... + 1564783.

It is an arithmetic number, because the mean of its divisors is an integer number (72756783).

Almost surely, 2^381777406 is an apocalyptic number.

381777406 is a deficient number, since it is larger than the sum of its proper divisors (200276858).

381777406 is a wasteful number, since it uses less digits than its factorization.

381777406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129386.

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 381777406 is about 19539.1250059976. The cubic root of 381777406 is about 725.4431890334.

The spelling of 381777406 in words is "three hundred eighty-one million, seven hundred seventy-seven thousand, four hundred six".