378513644 has 6 divisors (see below), whose sum is σ = 662398884. Its totient is φ = 189256820.

The previous prime is 378513643. The next prime is 378513659. The reversal of 378513644 is 446315873.

It is a super-3 number, since 3×378513644³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (378513643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47314202 + ... + 47314209.

It is an arithmetic number, because the mean of its divisors is an integer number (110399814).

Almost surely, 2^378513644 is an apocalyptic number.

It is an amenable number.

378513644 is a deficient number, since it is larger than the sum of its proper divisors (283885240).

378513644 is a wasteful number, since it uses less digits than its factorization.

378513644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94628415 (or 94628413 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 378513644 is about 19455.4271091642. The cubic root of 378513644 is about 723.3700323758.

The spelling of 378513644 in words is "three hundred seventy-eight million, five hundred thirteen thousand, six hundred forty-four".