379997778 has 8 divisors (see below), whose sum is σ = 759995568. Its totient is φ = 126665924.

The previous prime is 379997771. The next prime is 379997809. The reversal of 379997778 is 877799973.

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

379997778 is an admirable number.

It is a super-2 number, since 2×379997778² = 288796622569874568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (379997771) 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, 31666476 + ... + 31666487.

It is an arithmetic number, because the mean of its divisors is an integer number (94999446).

Almost surely, 2^379997778 is an apocalyptic number.

379997778 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.

379997778 is a wasteful number, since it uses less digits than its factorization.

379997778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63332968.

The product of its digits is 42007896, while the sum is 66.

The square root of 379997778 is about 19493.5316964372. The cubic root of 379997778 is about 724.3142325613.

The spelling of 379997778 in words is "three hundred seventy-nine million, nine hundred ninety-seven thousand, seven hundred seventy-eight".