378649842 has 16 divisors (see below), whose sum is σ = 775770912. Its totient is φ = 123138080.

The previous prime is 378649829. The next prime is 378649853. The reversal of 378649842 is 248946873.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769368 + ... + 769859.

It is an arithmetic number, because the mean of its divisors is an integer number (48485682).

Almost surely, 2^378649842 is an apocalyptic number.

378649842 is an abundant number, since it is smaller than the sum of its proper divisors (397121070).

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

378649842 is a wasteful number, since it uses less digits than its factorization.

378649842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539273.

The product of its digits is 2322432, while the sum is 51.

The square root of 378649842 is about 19458.9270516131. The cubic root of 378649842 is about 723.4567837508.

It can be divided in two parts, 3786 and 49842, that added together give a triangular number (53628 = T₃₂₇).

The spelling of 378649842 in words is "three hundred seventy-eight million, six hundred forty-nine thousand, eight hundred forty-two".