378655990 has 16 divisors (see below), whose sum is σ = 688609152. Its totient is φ = 149900544.

The previous prime is 378655973. The next prime is 378656029. The reversal of 378655990 is 99556873.

It is a congruent number.

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, 194214 + ... + 196153.

It is an arithmetic number, because the mean of its divisors is an integer number (43038072).

Almost surely, 2^378655990 is an apocalyptic number.

378655990 is a deficient number, since it is larger than the sum of its proper divisors (309953162).

378655990 is a wasteful number, since it uses less digits than its factorization.

378655990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390471.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The square root of 378655990 is about 19459.0850247384. The cubic root of 378655990 is about 723.4606992313.

The spelling of 378655990 in words is "three hundred seventy-eight million, six hundred fifty-five thousand, nine hundred ninety".