381640054 has 8 divisors (see below), whose sum is σ = 586422648. Its totient is φ = 186165840.

The previous prime is 381640043. The next prime is 381640057. The reversal of 381640054 is 450046183.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 381639998 and 381640025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381640057) 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, 2326992 + ... + 2327155.

It is an arithmetic number, because the mean of its divisors is an integer number (73302831).

Almost surely, 2^381640054 is an apocalyptic number.

381640054 is a deficient number, since it is larger than the sum of its proper divisors (204782594).

381640054 is a wasteful number, since it uses less digits than its factorization.

381640054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654190.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 381640054 is about 19535.6098957775. The cubic root of 381640054 is about 725.3561810692.

The spelling of 381640054 in words is "three hundred eighty-one million, six hundred forty thousand, fifty-four".