378109690 has 32 divisors (see below), whose sum is σ = 818766720. Its totient is φ = 122814144.

The previous prime is 378109687. The next prime is 378109691. The reversal of 378109690 is 96901873.

It is a super-2 number, since 2×378109690² = 285933875343792200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (378109691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140817 + ... + 143476.

It is an arithmetic number, because the mean of its divisors is an integer number (25586460).

Almost surely, 2^378109690 is an apocalyptic number.

378109690 is an abundant number, since it is smaller than the sum of its proper divisors (440657030).

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

378109690 is a wasteful number, since it uses less digits than its factorization.

378109690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284326.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 378109690 is about 19445.0428130154. The cubic root of 378109690 is about 723.1126112465.

The spelling of 378109690 in words is "three hundred seventy-eight million, one hundred nine thousand, six hundred ninety".