381012978 has 8 divisors (see below), whose sum is σ = 762025968. Its totient is φ = 127004324.

The previous prime is 381012977. The next prime is 381012979. The reversal of 381012978 is 879210183.

It is an interprime number because it is at equal distance from previous prime (381012977) and next prime (381012979).

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

381012978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (381012977) 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, 31751076 + ... + 31751087.

It is an arithmetic number, because the mean of its divisors is an integer number (95253246).

Almost surely, 2^381012978 is an apocalyptic number.

381012978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

381012978 is a wasteful number, since it uses less digits than its factorization.

381012978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63502168.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 381012978 is about 19519.5537346528. The cubic root of 381012978 is about 724.9586836542.

The spelling of 381012978 in words is "three hundred eighty-one million, twelve thousand, nine hundred seventy-eight".